diff --git a/UnityCompatibilityTests.Unity35/Assets/Demigiant/DOTween/DOTween.XML b/UnityCompatibilityTests.Unity35/Assets/Demigiant/DOTween/DOTween.XML
index 33da8e8..cad8369 100644
--- a/UnityCompatibilityTests.Unity35/Assets/Demigiant/DOTween/DOTween.XML
+++ b/UnityCompatibilityTests.Unity35/Assets/Demigiant/DOTween/DOTween.XML
@@ -35,6 +35,12 @@
         <member name="F:DG.Tweening.PathMode.Sidescroller2D">
             <summary>2D side-scroller path</summary>
         </member>
+        <member name="T:DG.Tweening.Core.Surrogates.Vector2Surrogate">
+            <summary>
+            A surrogate for Vector2/3/4 values to work around Unity's bug when trying to cast to
+            a Vector2/3/4 plugin on WP8.1
+            </summary>
+        </member>
         <member name="T:DG.Tweening.TweenType">
             <summary>
             Used internally
@@ -532,29 +538,29 @@
             <summary>Options for float tweens</summary>
             <param name="snapping">If TRUE the tween will smoothly snap all values to integers</param>
         </member>
-        <member name="M:DG.Tweening.TweenSettingsExtensions.SetOptions(DG.Tweening.Core.TweenerCore{UnityEngine.Vector2,UnityEngine.Vector2,DG.Tweening.Plugins.Options.VectorOptions},System.Boolean)">
+        <member name="M:DG.Tweening.TweenSettingsExtensions.SetOptions(DG.Tweening.Core.TweenerCore{DG.Tweening.Core.Surrogates.Vector2Surrogate,DG.Tweening.Core.Surrogates.Vector2Surrogate,DG.Tweening.Plugins.Options.VectorOptions},System.Boolean)">
             <summary>Options for Vector2 tweens</summary>
             <param name="snapping">If TRUE the tween will smoothly snap all values to integers</param>
         </member>
-        <member name="M:DG.Tweening.TweenSettingsExtensions.SetOptions(DG.Tweening.Core.TweenerCore{UnityEngine.Vector2,UnityEngine.Vector2,DG.Tweening.Plugins.Options.VectorOptions},DG.Tweening.AxisConstraint,System.Boolean)">
+        <member name="M:DG.Tweening.TweenSettingsExtensions.SetOptions(DG.Tweening.Core.TweenerCore{DG.Tweening.Core.Surrogates.Vector2Surrogate,DG.Tweening.Core.Surrogates.Vector2Surrogate,DG.Tweening.Plugins.Options.VectorOptions},DG.Tweening.AxisConstraint,System.Boolean)">
             <summary>Options for Vector2 tweens</summary>
             <param name="axisConstraint">Selecting an axis will tween the vector only on that axis, leaving the others untouched</param>
             <param name="snapping">If TRUE the tween will smoothly snap all values to integers</param>
         </member>
-        <member name="M:DG.Tweening.TweenSettingsExtensions.SetOptions(DG.Tweening.Core.TweenerCore{UnityEngine.Vector3,UnityEngine.Vector3,DG.Tweening.Plugins.Options.VectorOptions},System.Boolean)">
+        <member name="M:DG.Tweening.TweenSettingsExtensions.SetOptions(DG.Tweening.Core.TweenerCore{DG.Tweening.Core.Surrogates.Vector3Surrogate,DG.Tweening.Core.Surrogates.Vector3Surrogate,DG.Tweening.Plugins.Options.VectorOptions},System.Boolean)">
             <summary>Options for Vector3 tweens</summary>
             <param name="snapping">If TRUE the tween will smoothly snap all values to integers</param>
         </member>
-        <member name="M:DG.Tweening.TweenSettingsExtensions.SetOptions(DG.Tweening.Core.TweenerCore{UnityEngine.Vector3,UnityEngine.Vector3,DG.Tweening.Plugins.Options.VectorOptions},DG.Tweening.AxisConstraint,System.Boolean)">
+        <member name="M:DG.Tweening.TweenSettingsExtensions.SetOptions(DG.Tweening.Core.TweenerCore{DG.Tweening.Core.Surrogates.Vector3Surrogate,DG.Tweening.Core.Surrogates.Vector3Surrogate,DG.Tweening.Plugins.Options.VectorOptions},DG.Tweening.AxisConstraint,System.Boolean)">
             <summary>Options for Vector3 tweens</summary>
             <param name="axisConstraint">Selecting an axis will tween the vector only on that axis, leaving the others untouched</param>
             <param name="snapping">If TRUE the tween will smoothly snap all values to integers</param>
         </member>
-        <member name="M:DG.Tweening.TweenSettingsExtensions.SetOptions(DG.Tweening.Core.TweenerCore{UnityEngine.Vector4,UnityEngine.Vector4,DG.Tweening.Plugins.Options.VectorOptions},System.Boolean)">
+        <member name="M:DG.Tweening.TweenSettingsExtensions.SetOptions(DG.Tweening.Core.TweenerCore{DG.Tweening.Core.Surrogates.Vector4Surrogate,DG.Tweening.Core.Surrogates.Vector4Surrogate,DG.Tweening.Plugins.Options.VectorOptions},System.Boolean)">
             <summary>Options for Vector4 tweens</summary>
             <param name="snapping">If TRUE the tween will smoothly snap all values to integers</param>
         </member>
-        <member name="M:DG.Tweening.TweenSettingsExtensions.SetOptions(DG.Tweening.Core.TweenerCore{UnityEngine.Vector4,UnityEngine.Vector4,DG.Tweening.Plugins.Options.VectorOptions},DG.Tweening.AxisConstraint,System.Boolean)">
+        <member name="M:DG.Tweening.TweenSettingsExtensions.SetOptions(DG.Tweening.Core.TweenerCore{DG.Tweening.Core.Surrogates.Vector4Surrogate,DG.Tweening.Core.Surrogates.Vector4Surrogate,DG.Tweening.Plugins.Options.VectorOptions},DG.Tweening.AxisConstraint,System.Boolean)">
             <summary>Options for Vector4 tweens</summary>
             <param name="axisConstraint">Selecting an axis will tween the vector only on that axis, leaving the others untouched</param>
             <param name="snapping">If TRUE the tween will smoothly snap all values to integers</param>
@@ -564,7 +570,7 @@
             <param name="useShortest360Route">If TRUE (default) the rotation will take the shortest route, and will not rotate more than 360°.
             If FALSE the rotation will be fully accounted. Is always FALSE if the tween is set as relative</param>
         </member>
-        <member name="M:DG.Tweening.TweenSettingsExtensions.SetOptions(DG.Tweening.Core.TweenerCore{UnityEngine.Color,UnityEngine.Color,DG.Tweening.Plugins.Options.ColorOptions},System.Boolean)">
+        <member name="M:DG.Tweening.TweenSettingsExtensions.SetOptions(DG.Tweening.Core.TweenerCore{DG.Tweening.Core.Surrogates.ColorSurrogate,DG.Tweening.Core.Surrogates.ColorSurrogate,DG.Tweening.Plugins.Options.ColorOptions},System.Boolean)">
             <summary>Options for Color tweens</summary>
             <param name="alphaOnly">If TRUE only the alpha value of the color will be tweened</param>
         </member>
@@ -1304,6 +1310,12 @@
             and returns the total number of tweens involved.
             </summary>
         </member>
+        <member name="T:DG.Tweening.Core.Surrogates.Vector3Surrogate">
+            <summary>
+            A surrogate for Vector2/3/4 values to work around Unity's bug when trying to cast to
+            a Vector2/3/4 plugin on WP8.1
+            </summary>
+        </member>
         <member name="T:DG.Tweening.PathType">
             <summary>
             Type of path to use with DOPath tweens
@@ -1484,7 +1496,7 @@
             <para>Example usage with lambda:</para><code>x=> myProperty = x</code></param>
             <param name="endValue">The end value to reach</param><param name="duration">The tween's duration</param>
         </member>
-        <member name="M:DG.Tweening.DOTween.To(DG.Tweening.Core.DOGetter{UnityEngine.Vector2},DG.Tweening.Core.DOSetter{UnityEngine.Vector2},UnityEngine.Vector2,System.Single)">
+        <member name="M:DG.Tweening.DOTween.To(DG.Tweening.Core.DOGetter{DG.Tweening.Core.Surrogates.Vector2Surrogate},DG.Tweening.Core.DOSetter{DG.Tweening.Core.Surrogates.Vector2Surrogate},UnityEngine.Vector2,System.Single)">
             <summary>Tweens a property or field to the given value using default plugins</summary>
             <param name="getter">A getter for the field or property to tween.
             <para>Example usage with lambda:</para><code>()=> myProperty</code></param>
@@ -1492,7 +1504,7 @@
             <para>Example usage with lambda:</para><code>x=> myProperty = x</code></param>
             <param name="endValue">The end value to reach</param><param name="duration">The tween's duration</param>
         </member>
-        <member name="M:DG.Tweening.DOTween.To(DG.Tweening.Core.DOGetter{UnityEngine.Vector3},DG.Tweening.Core.DOSetter{UnityEngine.Vector3},UnityEngine.Vector3,System.Single)">
+        <member name="M:DG.Tweening.DOTween.To(DG.Tweening.Core.DOGetter{DG.Tweening.Core.Surrogates.Vector3Surrogate},DG.Tweening.Core.DOSetter{DG.Tweening.Core.Surrogates.Vector3Surrogate},UnityEngine.Vector3,System.Single)">
             <summary>Tweens a property or field to the given value using default plugins</summary>
             <param name="getter">A getter for the field or property to tween.
             <para>Example usage with lambda:</para><code>()=> myProperty</code></param>
@@ -1500,7 +1512,7 @@
             <para>Example usage with lambda:</para><code>x=> myProperty = x</code></param>
             <param name="endValue">The end value to reach</param><param name="duration">The tween's duration</param>
         </member>
-        <member name="M:DG.Tweening.DOTween.To(DG.Tweening.Core.DOGetter{UnityEngine.Vector4},DG.Tweening.Core.DOSetter{UnityEngine.Vector4},UnityEngine.Vector4,System.Single)">
+        <member name="M:DG.Tweening.DOTween.To(DG.Tweening.Core.DOGetter{DG.Tweening.Core.Surrogates.Vector4Surrogate},DG.Tweening.Core.DOSetter{DG.Tweening.Core.Surrogates.Vector4Surrogate},UnityEngine.Vector4,System.Single)">
             <summary>Tweens a property or field to the given value using default plugins</summary>
             <param name="getter">A getter for the field or property to tween.
             <para>Example usage with lambda:</para><code>()=> myProperty</code></param>
@@ -1516,7 +1528,7 @@
             <para>Example usage with lambda:</para><code>x=> myProperty = x</code></param>
             <param name="endValue">The end value to reach</param><param name="duration">The tween's duration</param>
         </member>
-        <member name="M:DG.Tweening.DOTween.To(DG.Tweening.Core.DOGetter{UnityEngine.Color},DG.Tweening.Core.DOSetter{UnityEngine.Color},UnityEngine.Color,System.Single)">
+        <member name="M:DG.Tweening.DOTween.To(DG.Tweening.Core.DOGetter{DG.Tweening.Core.Surrogates.ColorSurrogate},DG.Tweening.Core.DOSetter{DG.Tweening.Core.Surrogates.ColorSurrogate},UnityEngine.Color,System.Single)">
             <summary>Tweens a property or field to the given value using default plugins</summary>
             <param name="getter">A getter for the field or property to tween.
             <para>Example usage with lambda:</para><code>()=> myProperty</code></param>
@@ -1551,7 +1563,7 @@
             <para>Example usage with lambda:</para><code>x=> myProperty = x</code></param>
             <param name="endValue">The end value to reach</param><param name="duration">The tween's duration</param>
         </member>
-        <member name="M:DG.Tweening.DOTween.ToAxis(DG.Tweening.Core.DOGetter{UnityEngine.Vector3},DG.Tweening.Core.DOSetter{UnityEngine.Vector3},System.Single,System.Single,DG.Tweening.AxisConstraint)">
+        <member name="M:DG.Tweening.DOTween.ToAxis(DG.Tweening.Core.DOGetter{DG.Tweening.Core.Surrogates.Vector3Surrogate},DG.Tweening.Core.DOSetter{DG.Tweening.Core.Surrogates.Vector3Surrogate},System.Single,System.Single,DG.Tweening.AxisConstraint)">
             <summary>Tweens only one axis of a Vector3 to the given value using default plugins.</summary>
             <param name="getter">A getter for the field or property to tween.
             <para>Example usage with lambda:</para><code>()=> myProperty</code></param>
@@ -1560,7 +1572,7 @@
             <param name="endValue">The end value to reach</param><param name="duration">The tween's duration</param>
             <param name="axisConstraint">The axis to tween</param>
         </member>
-        <member name="M:DG.Tweening.DOTween.ToAlpha(DG.Tweening.Core.DOGetter{UnityEngine.Color},DG.Tweening.Core.DOSetter{UnityEngine.Color},System.Single,System.Single)">
+        <member name="M:DG.Tweening.DOTween.ToAlpha(DG.Tweening.Core.DOGetter{DG.Tweening.Core.Surrogates.ColorSurrogate},DG.Tweening.Core.DOSetter{DG.Tweening.Core.Surrogates.ColorSurrogate},System.Single,System.Single)">
             <summary>Tweens only the alpha of a Color to the given value using default plugins</summary>
             <param name="getter">A getter for the field or property to tween.
             <para>Example usage with lambda:</para><code>()=> myProperty</code></param>
@@ -1821,6 +1833,12 @@
             <summary>Continuously increments the tween at the end of each loop cycle (A to B, B to B+(A-B), and so on), thus always moving "onward".
             <para>In case of String tweens works only if the tween is set as relative</para></summary>
         </member>
+        <member name="T:DG.Tweening.Core.Surrogates.Vector4Surrogate">
+            <summary>
+            A surrogate for Vector2/3/4 values to work around Unity's bug when trying to cast to
+            a Vector2/3/4 plugin on WP8.1
+            </summary>
+        </member>
         <member name="T:DG.Tweening.Tweener">
             <summary>
             Animates a single value
diff --git a/UnityCompatibilityTests.Unity35/Assets/Demigiant/DOTween/DOTween.dll b/UnityCompatibilityTests.Unity35/Assets/Demigiant/DOTween/DOTween.dll
index 2fe3e75..e00a1cc 100644
Binary files a/UnityCompatibilityTests.Unity35/Assets/Demigiant/DOTween/DOTween.dll and b/UnityCompatibilityTests.Unity35/Assets/Demigiant/DOTween/DOTween.dll differ
diff --git a/UnityCompatibilityTests.Unity35/Assets/Demigiant/DOTween/DOTween.dll.mdb b/UnityCompatibilityTests.Unity35/Assets/Demigiant/DOTween/DOTween.dll.mdb
index f26fa1f..1a5a05d 100644
Binary files a/UnityCompatibilityTests.Unity35/Assets/Demigiant/DOTween/DOTween.dll.mdb and b/UnityCompatibilityTests.Unity35/Assets/Demigiant/DOTween/DOTween.dll.mdb differ
diff --git a/UnityCompatibilityTests.Unity35/Assets/Demigiant/DOTween/DOTween43.dll b/UnityCompatibilityTests.Unity35/Assets/Demigiant/DOTween/DOTween43.dll
index 9f03c66..cc0654e 100644
Binary files a/UnityCompatibilityTests.Unity35/Assets/Demigiant/DOTween/DOTween43.dll and b/UnityCompatibilityTests.Unity35/Assets/Demigiant/DOTween/DOTween43.dll differ
diff --git a/UnityCompatibilityTests.Unity35/Assets/Demigiant/DOTween/DOTween43.dll.mdb b/UnityCompatibilityTests.Unity35/Assets/Demigiant/DOTween/DOTween43.dll.mdb
index 754af3e..2f3cccf 100644
Binary files a/UnityCompatibilityTests.Unity35/Assets/Demigiant/DOTween/DOTween43.dll.mdb and b/UnityCompatibilityTests.Unity35/Assets/Demigiant/DOTween/DOTween43.dll.mdb differ
diff --git a/UnityCompatibilityTests.Unity35/Assets/Demigiant/DOTween/DOTween46.dll b/UnityCompatibilityTests.Unity35/Assets/Demigiant/DOTween/DOTween46.dll
index ff9e1bd..530572e 100644
Binary files a/UnityCompatibilityTests.Unity35/Assets/Demigiant/DOTween/DOTween46.dll and b/UnityCompatibilityTests.Unity35/Assets/Demigiant/DOTween/DOTween46.dll differ
diff --git a/UnityCompatibilityTests.Unity35/Assets/Demigiant/DOTween/DOTween46.dll.mdb b/UnityCompatibilityTests.Unity35/Assets/Demigiant/DOTween/DOTween46.dll.mdb
index d5203ff..d396e03 100644
Binary files a/UnityCompatibilityTests.Unity35/Assets/Demigiant/DOTween/DOTween46.dll.mdb and b/UnityCompatibilityTests.Unity35/Assets/Demigiant/DOTween/DOTween46.dll.mdb differ
diff --git a/UnityCompatibilityTests.Unity35/Assets/Demigiant/DOTween/DOTween50.dll b/UnityCompatibilityTests.Unity35/Assets/Demigiant/DOTween/DOTween50.dll
index 68eaf9f..9c38504 100644
Binary files a/UnityCompatibilityTests.Unity35/Assets/Demigiant/DOTween/DOTween50.dll and b/UnityCompatibilityTests.Unity35/Assets/Demigiant/DOTween/DOTween50.dll differ
diff --git a/UnityCompatibilityTests.Unity35/Assets/Demigiant/DOTween/DOTween50.dll.mdb b/UnityCompatibilityTests.Unity35/Assets/Demigiant/DOTween/DOTween50.dll.mdb
index 5417e68..72ab287 100644
Binary files a/UnityCompatibilityTests.Unity35/Assets/Demigiant/DOTween/DOTween50.dll.mdb and b/UnityCompatibilityTests.Unity35/Assets/Demigiant/DOTween/DOTween50.dll.mdb differ
diff --git a/UnityCompatibilityTests.Unity35/Assets/Demigiant/DOTween/Editor/DOTweenEditor.dll b/UnityCompatibilityTests.Unity35/Assets/Demigiant/DOTween/Editor/DOTweenEditor.dll
index fdc3b95..92840ec 100644
Binary files a/UnityCompatibilityTests.Unity35/Assets/Demigiant/DOTween/Editor/DOTweenEditor.dll and b/UnityCompatibilityTests.Unity35/Assets/Demigiant/DOTween/Editor/DOTweenEditor.dll differ
diff --git a/UnityCompatibilityTests.Unity35/Assets/Demigiant/DOTween/Editor/DOTweenEditor.dll.mdb b/UnityCompatibilityTests.Unity35/Assets/Demigiant/DOTween/Editor/DOTweenEditor.dll.mdb
index 9235125..4bf7cb8 100644
Binary files a/UnityCompatibilityTests.Unity35/Assets/Demigiant/DOTween/Editor/DOTweenEditor.dll.mdb and b/UnityCompatibilityTests.Unity35/Assets/Demigiant/DOTween/Editor/DOTweenEditor.dll.mdb differ
diff --git a/UnityTests.Unity4/Assets/Demigiant/DOTween/DOTween.XML b/UnityTests.Unity4/Assets/Demigiant/DOTween/DOTween.XML
index 33da8e8..cad8369 100644
--- a/UnityTests.Unity4/Assets/Demigiant/DOTween/DOTween.XML
+++ b/UnityTests.Unity4/Assets/Demigiant/DOTween/DOTween.XML
@@ -35,6 +35,12 @@
         <member name="F:DG.Tweening.PathMode.Sidescroller2D">
             <summary>2D side-scroller path</summary>
         </member>
+        <member name="T:DG.Tweening.Core.Surrogates.Vector2Surrogate">
+            <summary>
+            A surrogate for Vector2/3/4 values to work around Unity's bug when trying to cast to
+            a Vector2/3/4 plugin on WP8.1
+            </summary>
+        </member>
         <member name="T:DG.Tweening.TweenType">
             <summary>
             Used internally
@@ -532,29 +538,29 @@
             <summary>Options for float tweens</summary>
             <param name="snapping">If TRUE the tween will smoothly snap all values to integers</param>
         </member>
-        <member name="M:DG.Tweening.TweenSettingsExtensions.SetOptions(DG.Tweening.Core.TweenerCore{UnityEngine.Vector2,UnityEngine.Vector2,DG.Tweening.Plugins.Options.VectorOptions},System.Boolean)">
+        <member name="M:DG.Tweening.TweenSettingsExtensions.SetOptions(DG.Tweening.Core.TweenerCore{DG.Tweening.Core.Surrogates.Vector2Surrogate,DG.Tweening.Core.Surrogates.Vector2Surrogate,DG.Tweening.Plugins.Options.VectorOptions},System.Boolean)">
             <summary>Options for Vector2 tweens</summary>
             <param name="snapping">If TRUE the tween will smoothly snap all values to integers</param>
         </member>
-        <member name="M:DG.Tweening.TweenSettingsExtensions.SetOptions(DG.Tweening.Core.TweenerCore{UnityEngine.Vector2,UnityEngine.Vector2,DG.Tweening.Plugins.Options.VectorOptions},DG.Tweening.AxisConstraint,System.Boolean)">
+        <member name="M:DG.Tweening.TweenSettingsExtensions.SetOptions(DG.Tweening.Core.TweenerCore{DG.Tweening.Core.Surrogates.Vector2Surrogate,DG.Tweening.Core.Surrogates.Vector2Surrogate,DG.Tweening.Plugins.Options.VectorOptions},DG.Tweening.AxisConstraint,System.Boolean)">
             <summary>Options for Vector2 tweens</summary>
             <param name="axisConstraint">Selecting an axis will tween the vector only on that axis, leaving the others untouched</param>
             <param name="snapping">If TRUE the tween will smoothly snap all values to integers</param>
         </member>
-        <member name="M:DG.Tweening.TweenSettingsExtensions.SetOptions(DG.Tweening.Core.TweenerCore{UnityEngine.Vector3,UnityEngine.Vector3,DG.Tweening.Plugins.Options.VectorOptions},System.Boolean)">
+        <member name="M:DG.Tweening.TweenSettingsExtensions.SetOptions(DG.Tweening.Core.TweenerCore{DG.Tweening.Core.Surrogates.Vector3Surrogate,DG.Tweening.Core.Surrogates.Vector3Surrogate,DG.Tweening.Plugins.Options.VectorOptions},System.Boolean)">
             <summary>Options for Vector3 tweens</summary>
             <param name="snapping">If TRUE the tween will smoothly snap all values to integers</param>
         </member>
-        <member name="M:DG.Tweening.TweenSettingsExtensions.SetOptions(DG.Tweening.Core.TweenerCore{UnityEngine.Vector3,UnityEngine.Vector3,DG.Tweening.Plugins.Options.VectorOptions},DG.Tweening.AxisConstraint,System.Boolean)">
+        <member name="M:DG.Tweening.TweenSettingsExtensions.SetOptions(DG.Tweening.Core.TweenerCore{DG.Tweening.Core.Surrogates.Vector3Surrogate,DG.Tweening.Core.Surrogates.Vector3Surrogate,DG.Tweening.Plugins.Options.VectorOptions},DG.Tweening.AxisConstraint,System.Boolean)">
             <summary>Options for Vector3 tweens</summary>
             <param name="axisConstraint">Selecting an axis will tween the vector only on that axis, leaving the others untouched</param>
             <param name="snapping">If TRUE the tween will smoothly snap all values to integers</param>
         </member>
-        <member name="M:DG.Tweening.TweenSettingsExtensions.SetOptions(DG.Tweening.Core.TweenerCore{UnityEngine.Vector4,UnityEngine.Vector4,DG.Tweening.Plugins.Options.VectorOptions},System.Boolean)">
+        <member name="M:DG.Tweening.TweenSettingsExtensions.SetOptions(DG.Tweening.Core.TweenerCore{DG.Tweening.Core.Surrogates.Vector4Surrogate,DG.Tweening.Core.Surrogates.Vector4Surrogate,DG.Tweening.Plugins.Options.VectorOptions},System.Boolean)">
             <summary>Options for Vector4 tweens</summary>
             <param name="snapping">If TRUE the tween will smoothly snap all values to integers</param>
         </member>
-        <member name="M:DG.Tweening.TweenSettingsExtensions.SetOptions(DG.Tweening.Core.TweenerCore{UnityEngine.Vector4,UnityEngine.Vector4,DG.Tweening.Plugins.Options.VectorOptions},DG.Tweening.AxisConstraint,System.Boolean)">
+        <member name="M:DG.Tweening.TweenSettingsExtensions.SetOptions(DG.Tweening.Core.TweenerCore{DG.Tweening.Core.Surrogates.Vector4Surrogate,DG.Tweening.Core.Surrogates.Vector4Surrogate,DG.Tweening.Plugins.Options.VectorOptions},DG.Tweening.AxisConstraint,System.Boolean)">
             <summary>Options for Vector4 tweens</summary>
             <param name="axisConstraint">Selecting an axis will tween the vector only on that axis, leaving the others untouched</param>
             <param name="snapping">If TRUE the tween will smoothly snap all values to integers</param>
@@ -564,7 +570,7 @@
             <param name="useShortest360Route">If TRUE (default) the rotation will take the shortest route, and will not rotate more than 360°.
             If FALSE the rotation will be fully accounted. Is always FALSE if the tween is set as relative</param>
         </member>
-        <member name="M:DG.Tweening.TweenSettingsExtensions.SetOptions(DG.Tweening.Core.TweenerCore{UnityEngine.Color,UnityEngine.Color,DG.Tweening.Plugins.Options.ColorOptions},System.Boolean)">
+        <member name="M:DG.Tweening.TweenSettingsExtensions.SetOptions(DG.Tweening.Core.TweenerCore{DG.Tweening.Core.Surrogates.ColorSurrogate,DG.Tweening.Core.Surrogates.ColorSurrogate,DG.Tweening.Plugins.Options.ColorOptions},System.Boolean)">
             <summary>Options for Color tweens</summary>
             <param name="alphaOnly">If TRUE only the alpha value of the color will be tweened</param>
         </member>
@@ -1304,6 +1310,12 @@
             and returns the total number of tweens involved.
             </summary>
         </member>
+        <member name="T:DG.Tweening.Core.Surrogates.Vector3Surrogate">
+            <summary>
+            A surrogate for Vector2/3/4 values to work around Unity's bug when trying to cast to
+            a Vector2/3/4 plugin on WP8.1
+            </summary>
+        </member>
         <member name="T:DG.Tweening.PathType">
             <summary>
             Type of path to use with DOPath tweens
@@ -1484,7 +1496,7 @@
             <para>Example usage with lambda:</para><code>x=> myProperty = x</code></param>
             <param name="endValue">The end value to reach</param><param name="duration">The tween's duration</param>
         </member>
-        <member name="M:DG.Tweening.DOTween.To(DG.Tweening.Core.DOGetter{UnityEngine.Vector2},DG.Tweening.Core.DOSetter{UnityEngine.Vector2},UnityEngine.Vector2,System.Single)">
+        <member name="M:DG.Tweening.DOTween.To(DG.Tweening.Core.DOGetter{DG.Tweening.Core.Surrogates.Vector2Surrogate},DG.Tweening.Core.DOSetter{DG.Tweening.Core.Surrogates.Vector2Surrogate},UnityEngine.Vector2,System.Single)">
             <summary>Tweens a property or field to the given value using default plugins</summary>
             <param name="getter">A getter for the field or property to tween.
             <para>Example usage with lambda:</para><code>()=> myProperty</code></param>
@@ -1492,7 +1504,7 @@
             <para>Example usage with lambda:</para><code>x=> myProperty = x</code></param>
             <param name="endValue">The end value to reach</param><param name="duration">The tween's duration</param>
         </member>
-        <member name="M:DG.Tweening.DOTween.To(DG.Tweening.Core.DOGetter{UnityEngine.Vector3},DG.Tweening.Core.DOSetter{UnityEngine.Vector3},UnityEngine.Vector3,System.Single)">
+        <member name="M:DG.Tweening.DOTween.To(DG.Tweening.Core.DOGetter{DG.Tweening.Core.Surrogates.Vector3Surrogate},DG.Tweening.Core.DOSetter{DG.Tweening.Core.Surrogates.Vector3Surrogate},UnityEngine.Vector3,System.Single)">
             <summary>Tweens a property or field to the given value using default plugins</summary>
             <param name="getter">A getter for the field or property to tween.
             <para>Example usage with lambda:</para><code>()=> myProperty</code></param>
@@ -1500,7 +1512,7 @@
             <para>Example usage with lambda:</para><code>x=> myProperty = x</code></param>
             <param name="endValue">The end value to reach</param><param name="duration">The tween's duration</param>
         </member>
-        <member name="M:DG.Tweening.DOTween.To(DG.Tweening.Core.DOGetter{UnityEngine.Vector4},DG.Tweening.Core.DOSetter{UnityEngine.Vector4},UnityEngine.Vector4,System.Single)">
+        <member name="M:DG.Tweening.DOTween.To(DG.Tweening.Core.DOGetter{DG.Tweening.Core.Surrogates.Vector4Surrogate},DG.Tweening.Core.DOSetter{DG.Tweening.Core.Surrogates.Vector4Surrogate},UnityEngine.Vector4,System.Single)">
             <summary>Tweens a property or field to the given value using default plugins</summary>
             <param name="getter">A getter for the field or property to tween.
             <para>Example usage with lambda:</para><code>()=> myProperty</code></param>
@@ -1516,7 +1528,7 @@
             <para>Example usage with lambda:</para><code>x=> myProperty = x</code></param>
             <param name="endValue">The end value to reach</param><param name="duration">The tween's duration</param>
         </member>
-        <member name="M:DG.Tweening.DOTween.To(DG.Tweening.Core.DOGetter{UnityEngine.Color},DG.Tweening.Core.DOSetter{UnityEngine.Color},UnityEngine.Color,System.Single)">
+        <member name="M:DG.Tweening.DOTween.To(DG.Tweening.Core.DOGetter{DG.Tweening.Core.Surrogates.ColorSurrogate},DG.Tweening.Core.DOSetter{DG.Tweening.Core.Surrogates.ColorSurrogate},UnityEngine.Color,System.Single)">
             <summary>Tweens a property or field to the given value using default plugins</summary>
             <param name="getter">A getter for the field or property to tween.
             <para>Example usage with lambda:</para><code>()=> myProperty</code></param>
@@ -1551,7 +1563,7 @@
             <para>Example usage with lambda:</para><code>x=> myProperty = x</code></param>
             <param name="endValue">The end value to reach</param><param name="duration">The tween's duration</param>
         </member>
-        <member name="M:DG.Tweening.DOTween.ToAxis(DG.Tweening.Core.DOGetter{UnityEngine.Vector3},DG.Tweening.Core.DOSetter{UnityEngine.Vector3},System.Single,System.Single,DG.Tweening.AxisConstraint)">
+        <member name="M:DG.Tweening.DOTween.ToAxis(DG.Tweening.Core.DOGetter{DG.Tweening.Core.Surrogates.Vector3Surrogate},DG.Tweening.Core.DOSetter{DG.Tweening.Core.Surrogates.Vector3Surrogate},System.Single,System.Single,DG.Tweening.AxisConstraint)">
             <summary>Tweens only one axis of a Vector3 to the given value using default plugins.</summary>
             <param name="getter">A getter for the field or property to tween.
             <para>Example usage with lambda:</para><code>()=> myProperty</code></param>
@@ -1560,7 +1572,7 @@
             <param name="endValue">The end value to reach</param><param name="duration">The tween's duration</param>
             <param name="axisConstraint">The axis to tween</param>
         </member>
-        <member name="M:DG.Tweening.DOTween.ToAlpha(DG.Tweening.Core.DOGetter{UnityEngine.Color},DG.Tweening.Core.DOSetter{UnityEngine.Color},System.Single,System.Single)">
+        <member name="M:DG.Tweening.DOTween.ToAlpha(DG.Tweening.Core.DOGetter{DG.Tweening.Core.Surrogates.ColorSurrogate},DG.Tweening.Core.DOSetter{DG.Tweening.Core.Surrogates.ColorSurrogate},System.Single,System.Single)">
             <summary>Tweens only the alpha of a Color to the given value using default plugins</summary>
             <param name="getter">A getter for the field or property to tween.
             <para>Example usage with lambda:</para><code>()=> myProperty</code></param>
@@ -1821,6 +1833,12 @@
             <summary>Continuously increments the tween at the end of each loop cycle (A to B, B to B+(A-B), and so on), thus always moving "onward".
             <para>In case of String tweens works only if the tween is set as relative</para></summary>
         </member>
+        <member name="T:DG.Tweening.Core.Surrogates.Vector4Surrogate">
+            <summary>
+            A surrogate for Vector2/3/4 values to work around Unity's bug when trying to cast to
+            a Vector2/3/4 plugin on WP8.1
+            </summary>
+        </member>
         <member name="T:DG.Tweening.Tweener">
             <summary>
             Animates a single value
diff --git a/UnityTests.Unity4/Assets/Demigiant/DOTween/DOTween.dll b/UnityTests.Unity4/Assets/Demigiant/DOTween/DOTween.dll
index 2fe3e75..e00a1cc 100644
Binary files a/UnityTests.Unity4/Assets/Demigiant/DOTween/DOTween.dll and b/UnityTests.Unity4/Assets/Demigiant/DOTween/DOTween.dll differ
diff --git a/UnityTests.Unity4/Assets/Demigiant/DOTween/DOTween.dll.mdb b/UnityTests.Unity4/Assets/Demigiant/DOTween/DOTween.dll.mdb
index f26fa1f..1a5a05d 100644
Binary files a/UnityTests.Unity4/Assets/Demigiant/DOTween/DOTween.dll.mdb and b/UnityTests.Unity4/Assets/Demigiant/DOTween/DOTween.dll.mdb differ
diff --git a/UnityTests.Unity4/Assets/Demigiant/DOTween/DOTween43.dll b/UnityTests.Unity4/Assets/Demigiant/DOTween/DOTween43.dll
index 9f03c66..cc0654e 100644
Binary files a/UnityTests.Unity4/Assets/Demigiant/DOTween/DOTween43.dll and b/UnityTests.Unity4/Assets/Demigiant/DOTween/DOTween43.dll differ
diff --git a/UnityTests.Unity4/Assets/Demigiant/DOTween/DOTween43.dll.mdb b/UnityTests.Unity4/Assets/Demigiant/DOTween/DOTween43.dll.mdb
index 754af3e..2f3cccf 100644
Binary files a/UnityTests.Unity4/Assets/Demigiant/DOTween/DOTween43.dll.mdb and b/UnityTests.Unity4/Assets/Demigiant/DOTween/DOTween43.dll.mdb differ
diff --git a/UnityTests.Unity4/Assets/Demigiant/DOTween/DOTween46.dll b/UnityTests.Unity4/Assets/Demigiant/DOTween/DOTween46.dll
index ff9e1bd..530572e 100644
Binary files a/UnityTests.Unity4/Assets/Demigiant/DOTween/DOTween46.dll and b/UnityTests.Unity4/Assets/Demigiant/DOTween/DOTween46.dll differ
diff --git a/UnityTests.Unity4/Assets/Demigiant/DOTween/DOTween46.dll.mdb b/UnityTests.Unity4/Assets/Demigiant/DOTween/DOTween46.dll.mdb
index d5203ff..d396e03 100644
Binary files a/UnityTests.Unity4/Assets/Demigiant/DOTween/DOTween46.dll.mdb and b/UnityTests.Unity4/Assets/Demigiant/DOTween/DOTween46.dll.mdb differ
diff --git a/UnityTests.Unity4/Assets/Demigiant/DOTween/DOTween50.dll b/UnityTests.Unity4/Assets/Demigiant/DOTween/DOTween50.dll
index 68eaf9f..9c38504 100644
Binary files a/UnityTests.Unity4/Assets/Demigiant/DOTween/DOTween50.dll and b/UnityTests.Unity4/Assets/Demigiant/DOTween/DOTween50.dll differ
diff --git a/UnityTests.Unity4/Assets/Demigiant/DOTween/DOTween50.dll.mdb b/UnityTests.Unity4/Assets/Demigiant/DOTween/DOTween50.dll.mdb
index 5417e68..72ab287 100644
Binary files a/UnityTests.Unity4/Assets/Demigiant/DOTween/DOTween50.dll.mdb and b/UnityTests.Unity4/Assets/Demigiant/DOTween/DOTween50.dll.mdb differ
diff --git a/UnityTests.Unity4/Assets/Demigiant/DOTween/Editor/DOTweenEditor.dll b/UnityTests.Unity4/Assets/Demigiant/DOTween/Editor/DOTweenEditor.dll
index fdc3b95..92840ec 100644
Binary files a/UnityTests.Unity4/Assets/Demigiant/DOTween/Editor/DOTweenEditor.dll and b/UnityTests.Unity4/Assets/Demigiant/DOTween/Editor/DOTweenEditor.dll differ
diff --git a/UnityTests.Unity4/Assets/Demigiant/DOTween/Editor/DOTweenEditor.dll.mdb b/UnityTests.Unity4/Assets/Demigiant/DOTween/Editor/DOTweenEditor.dll.mdb
index 9235125..4bf7cb8 100644
Binary files a/UnityTests.Unity4/Assets/Demigiant/DOTween/Editor/DOTweenEditor.dll.mdb and b/UnityTests.Unity4/Assets/Demigiant/DOTween/Editor/DOTweenEditor.dll.mdb differ
diff --git a/UnityTests.Unity5/Assets/Demigiant/DOTween/DOTween.XML b/UnityTests.Unity5/Assets/Demigiant/DOTween/DOTween.XML
index 33da8e8..cad8369 100644
--- a/UnityTests.Unity5/Assets/Demigiant/DOTween/DOTween.XML
+++ b/UnityTests.Unity5/Assets/Demigiant/DOTween/DOTween.XML
@@ -35,6 +35,12 @@
         <member name="F:DG.Tweening.PathMode.Sidescroller2D">
             <summary>2D side-scroller path</summary>
         </member>
+        <member name="T:DG.Tweening.Core.Surrogates.Vector2Surrogate">
+            <summary>
+            A surrogate for Vector2/3/4 values to work around Unity's bug when trying to cast to
+            a Vector2/3/4 plugin on WP8.1
+            </summary>
+        </member>
         <member name="T:DG.Tweening.TweenType">
             <summary>
             Used internally
@@ -532,29 +538,29 @@
             <summary>Options for float tweens</summary>
             <param name="snapping">If TRUE the tween will smoothly snap all values to integers</param>
         </member>
-        <member name="M:DG.Tweening.TweenSettingsExtensions.SetOptions(DG.Tweening.Core.TweenerCore{UnityEngine.Vector2,UnityEngine.Vector2,DG.Tweening.Plugins.Options.VectorOptions},System.Boolean)">
+        <member name="M:DG.Tweening.TweenSettingsExtensions.SetOptions(DG.Tweening.Core.TweenerCore{DG.Tweening.Core.Surrogates.Vector2Surrogate,DG.Tweening.Core.Surrogates.Vector2Surrogate,DG.Tweening.Plugins.Options.VectorOptions},System.Boolean)">
             <summary>Options for Vector2 tweens</summary>
             <param name="snapping">If TRUE the tween will smoothly snap all values to integers</param>
         </member>
-        <member name="M:DG.Tweening.TweenSettingsExtensions.SetOptions(DG.Tweening.Core.TweenerCore{UnityEngine.Vector2,UnityEngine.Vector2,DG.Tweening.Plugins.Options.VectorOptions},DG.Tweening.AxisConstraint,System.Boolean)">
+        <member name="M:DG.Tweening.TweenSettingsExtensions.SetOptions(DG.Tweening.Core.TweenerCore{DG.Tweening.Core.Surrogates.Vector2Surrogate,DG.Tweening.Core.Surrogates.Vector2Surrogate,DG.Tweening.Plugins.Options.VectorOptions},DG.Tweening.AxisConstraint,System.Boolean)">
             <summary>Options for Vector2 tweens</summary>
             <param name="axisConstraint">Selecting an axis will tween the vector only on that axis, leaving the others untouched</param>
             <param name="snapping">If TRUE the tween will smoothly snap all values to integers</param>
         </member>
-        <member name="M:DG.Tweening.TweenSettingsExtensions.SetOptions(DG.Tweening.Core.TweenerCore{UnityEngine.Vector3,UnityEngine.Vector3,DG.Tweening.Plugins.Options.VectorOptions},System.Boolean)">
+        <member name="M:DG.Tweening.TweenSettingsExtensions.SetOptions(DG.Tweening.Core.TweenerCore{DG.Tweening.Core.Surrogates.Vector3Surrogate,DG.Tweening.Core.Surrogates.Vector3Surrogate,DG.Tweening.Plugins.Options.VectorOptions},System.Boolean)">
             <summary>Options for Vector3 tweens</summary>
             <param name="snapping">If TRUE the tween will smoothly snap all values to integers</param>
         </member>
-        <member name="M:DG.Tweening.TweenSettingsExtensions.SetOptions(DG.Tweening.Core.TweenerCore{UnityEngine.Vector3,UnityEngine.Vector3,DG.Tweening.Plugins.Options.VectorOptions},DG.Tweening.AxisConstraint,System.Boolean)">
+        <member name="M:DG.Tweening.TweenSettingsExtensions.SetOptions(DG.Tweening.Core.TweenerCore{DG.Tweening.Core.Surrogates.Vector3Surrogate,DG.Tweening.Core.Surrogates.Vector3Surrogate,DG.Tweening.Plugins.Options.VectorOptions},DG.Tweening.AxisConstraint,System.Boolean)">
             <summary>Options for Vector3 tweens</summary>
             <param name="axisConstraint">Selecting an axis will tween the vector only on that axis, leaving the others untouched</param>
             <param name="snapping">If TRUE the tween will smoothly snap all values to integers</param>
         </member>
-        <member name="M:DG.Tweening.TweenSettingsExtensions.SetOptions(DG.Tweening.Core.TweenerCore{UnityEngine.Vector4,UnityEngine.Vector4,DG.Tweening.Plugins.Options.VectorOptions},System.Boolean)">
+        <member name="M:DG.Tweening.TweenSettingsExtensions.SetOptions(DG.Tweening.Core.TweenerCore{DG.Tweening.Core.Surrogates.Vector4Surrogate,DG.Tweening.Core.Surrogates.Vector4Surrogate,DG.Tweening.Plugins.Options.VectorOptions},System.Boolean)">
             <summary>Options for Vector4 tweens</summary>
             <param name="snapping">If TRUE the tween will smoothly snap all values to integers</param>
         </member>
-        <member name="M:DG.Tweening.TweenSettingsExtensions.SetOptions(DG.Tweening.Core.TweenerCore{UnityEngine.Vector4,UnityEngine.Vector4,DG.Tweening.Plugins.Options.VectorOptions},DG.Tweening.AxisConstraint,System.Boolean)">
+        <member name="M:DG.Tweening.TweenSettingsExtensions.SetOptions(DG.Tweening.Core.TweenerCore{DG.Tweening.Core.Surrogates.Vector4Surrogate,DG.Tweening.Core.Surrogates.Vector4Surrogate,DG.Tweening.Plugins.Options.VectorOptions},DG.Tweening.AxisConstraint,System.Boolean)">
             <summary>Options for Vector4 tweens</summary>
             <param name="axisConstraint">Selecting an axis will tween the vector only on that axis, leaving the others untouched</param>
             <param name="snapping">If TRUE the tween will smoothly snap all values to integers</param>
@@ -564,7 +570,7 @@
             <param name="useShortest360Route">If TRUE (default) the rotation will take the shortest route, and will not rotate more than 360°.
             If FALSE the rotation will be fully accounted. Is always FALSE if the tween is set as relative</param>
         </member>
-        <member name="M:DG.Tweening.TweenSettingsExtensions.SetOptions(DG.Tweening.Core.TweenerCore{UnityEngine.Color,UnityEngine.Color,DG.Tweening.Plugins.Options.ColorOptions},System.Boolean)">
+        <member name="M:DG.Tweening.TweenSettingsExtensions.SetOptions(DG.Tweening.Core.TweenerCore{DG.Tweening.Core.Surrogates.ColorSurrogate,DG.Tweening.Core.Surrogates.ColorSurrogate,DG.Tweening.Plugins.Options.ColorOptions},System.Boolean)">
             <summary>Options for Color tweens</summary>
             <param name="alphaOnly">If TRUE only the alpha value of the color will be tweened</param>
         </member>
@@ -1304,6 +1310,12 @@
             and returns the total number of tweens involved.
             </summary>
         </member>
+        <member name="T:DG.Tweening.Core.Surrogates.Vector3Surrogate">
+            <summary>
+            A surrogate for Vector2/3/4 values to work around Unity's bug when trying to cast to
+            a Vector2/3/4 plugin on WP8.1
+            </summary>
+        </member>
         <member name="T:DG.Tweening.PathType">
             <summary>
             Type of path to use with DOPath tweens
@@ -1484,7 +1496,7 @@
             <para>Example usage with lambda:</para><code>x=> myProperty = x</code></param>
             <param name="endValue">The end value to reach</param><param name="duration">The tween's duration</param>
         </member>
-        <member name="M:DG.Tweening.DOTween.To(DG.Tweening.Core.DOGetter{UnityEngine.Vector2},DG.Tweening.Core.DOSetter{UnityEngine.Vector2},UnityEngine.Vector2,System.Single)">
+        <member name="M:DG.Tweening.DOTween.To(DG.Tweening.Core.DOGetter{DG.Tweening.Core.Surrogates.Vector2Surrogate},DG.Tweening.Core.DOSetter{DG.Tweening.Core.Surrogates.Vector2Surrogate},UnityEngine.Vector2,System.Single)">
             <summary>Tweens a property or field to the given value using default plugins</summary>
             <param name="getter">A getter for the field or property to tween.
             <para>Example usage with lambda:</para><code>()=> myProperty</code></param>
@@ -1492,7 +1504,7 @@
             <para>Example usage with lambda:</para><code>x=> myProperty = x</code></param>
             <param name="endValue">The end value to reach</param><param name="duration">The tween's duration</param>
         </member>
-        <member name="M:DG.Tweening.DOTween.To(DG.Tweening.Core.DOGetter{UnityEngine.Vector3},DG.Tweening.Core.DOSetter{UnityEngine.Vector3},UnityEngine.Vector3,System.Single)">
+        <member name="M:DG.Tweening.DOTween.To(DG.Tweening.Core.DOGetter{DG.Tweening.Core.Surrogates.Vector3Surrogate},DG.Tweening.Core.DOSetter{DG.Tweening.Core.Surrogates.Vector3Surrogate},UnityEngine.Vector3,System.Single)">
             <summary>Tweens a property or field to the given value using default plugins</summary>
             <param name="getter">A getter for the field or property to tween.
             <para>Example usage with lambda:</para><code>()=> myProperty</code></param>
@@ -1500,7 +1512,7 @@
             <para>Example usage with lambda:</para><code>x=> myProperty = x</code></param>
             <param name="endValue">The end value to reach</param><param name="duration">The tween's duration</param>
         </member>
-        <member name="M:DG.Tweening.DOTween.To(DG.Tweening.Core.DOGetter{UnityEngine.Vector4},DG.Tweening.Core.DOSetter{UnityEngine.Vector4},UnityEngine.Vector4,System.Single)">
+        <member name="M:DG.Tweening.DOTween.To(DG.Tweening.Core.DOGetter{DG.Tweening.Core.Surrogates.Vector4Surrogate},DG.Tweening.Core.DOSetter{DG.Tweening.Core.Surrogates.Vector4Surrogate},UnityEngine.Vector4,System.Single)">
             <summary>Tweens a property or field to the given value using default plugins</summary>
             <param name="getter">A getter for the field or property to tween.
             <para>Example usage with lambda:</para><code>()=> myProperty</code></param>
@@ -1516,7 +1528,7 @@
             <para>Example usage with lambda:</para><code>x=> myProperty = x</code></param>
             <param name="endValue">The end value to reach</param><param name="duration">The tween's duration</param>
         </member>
-        <member name="M:DG.Tweening.DOTween.To(DG.Tweening.Core.DOGetter{UnityEngine.Color},DG.Tweening.Core.DOSetter{UnityEngine.Color},UnityEngine.Color,System.Single)">
+        <member name="M:DG.Tweening.DOTween.To(DG.Tweening.Core.DOGetter{DG.Tweening.Core.Surrogates.ColorSurrogate},DG.Tweening.Core.DOSetter{DG.Tweening.Core.Surrogates.ColorSurrogate},UnityEngine.Color,System.Single)">
             <summary>Tweens a property or field to the given value using default plugins</summary>
             <param name="getter">A getter for the field or property to tween.
             <para>Example usage with lambda:</para><code>()=> myProperty</code></param>
@@ -1551,7 +1563,7 @@
             <para>Example usage with lambda:</para><code>x=> myProperty = x</code></param>
             <param name="endValue">The end value to reach</param><param name="duration">The tween's duration</param>
         </member>
-        <member name="M:DG.Tweening.DOTween.ToAxis(DG.Tweening.Core.DOGetter{UnityEngine.Vector3},DG.Tweening.Core.DOSetter{UnityEngine.Vector3},System.Single,System.Single,DG.Tweening.AxisConstraint)">
+        <member name="M:DG.Tweening.DOTween.ToAxis(DG.Tweening.Core.DOGetter{DG.Tweening.Core.Surrogates.Vector3Surrogate},DG.Tweening.Core.DOSetter{DG.Tweening.Core.Surrogates.Vector3Surrogate},System.Single,System.Single,DG.Tweening.AxisConstraint)">
             <summary>Tweens only one axis of a Vector3 to the given value using default plugins.</summary>
             <param name="getter">A getter for the field or property to tween.
             <para>Example usage with lambda:</para><code>()=> myProperty</code></param>
@@ -1560,7 +1572,7 @@
             <param name="endValue">The end value to reach</param><param name="duration">The tween's duration</param>
             <param name="axisConstraint">The axis to tween</param>
         </member>
-        <member name="M:DG.Tweening.DOTween.ToAlpha(DG.Tweening.Core.DOGetter{UnityEngine.Color},DG.Tweening.Core.DOSetter{UnityEngine.Color},System.Single,System.Single)">
+        <member name="M:DG.Tweening.DOTween.ToAlpha(DG.Tweening.Core.DOGetter{DG.Tweening.Core.Surrogates.ColorSurrogate},DG.Tweening.Core.DOSetter{DG.Tweening.Core.Surrogates.ColorSurrogate},System.Single,System.Single)">
             <summary>Tweens only the alpha of a Color to the given value using default plugins</summary>
             <param name="getter">A getter for the field or property to tween.
             <para>Example usage with lambda:</para><code>()=> myProperty</code></param>
@@ -1821,6 +1833,12 @@
             <summary>Continuously increments the tween at the end of each loop cycle (A to B, B to B+(A-B), and so on), thus always moving "onward".
             <para>In case of String tweens works only if the tween is set as relative</para></summary>
         </member>
+        <member name="T:DG.Tweening.Core.Surrogates.Vector4Surrogate">
+            <summary>
+            A surrogate for Vector2/3/4 values to work around Unity's bug when trying to cast to
+            a Vector2/3/4 plugin on WP8.1
+            </summary>
+        </member>
         <member name="T:DG.Tweening.Tweener">
             <summary>
             Animates a single value
diff --git a/UnityTests.Unity5/Assets/Demigiant/DOTween/DOTween.dll b/UnityTests.Unity5/Assets/Demigiant/DOTween/DOTween.dll
index 2fe3e75..e00a1cc 100644
Binary files a/UnityTests.Unity5/Assets/Demigiant/DOTween/DOTween.dll and b/UnityTests.Unity5/Assets/Demigiant/DOTween/DOTween.dll differ
diff --git a/UnityTests.Unity5/Assets/Demigiant/DOTween/DOTween.dll.mdb b/UnityTests.Unity5/Assets/Demigiant/DOTween/DOTween.dll.mdb
index f26fa1f..1a5a05d 100644
Binary files a/UnityTests.Unity5/Assets/Demigiant/DOTween/DOTween.dll.mdb and b/UnityTests.Unity5/Assets/Demigiant/DOTween/DOTween.dll.mdb differ
diff --git a/UnityTests.Unity5/Assets/Demigiant/DOTween/DOTween43.dll b/UnityTests.Unity5/Assets/Demigiant/DOTween/DOTween43.dll
index 9f03c66..cc0654e 100644
Binary files a/UnityTests.Unity5/Assets/Demigiant/DOTween/DOTween43.dll and b/UnityTests.Unity5/Assets/Demigiant/DOTween/DOTween43.dll differ
diff --git a/UnityTests.Unity5/Assets/Demigiant/DOTween/DOTween43.dll.mdb b/UnityTests.Unity5/Assets/Demigiant/DOTween/DOTween43.dll.mdb
index 754af3e..2f3cccf 100644
Binary files a/UnityTests.Unity5/Assets/Demigiant/DOTween/DOTween43.dll.mdb and b/UnityTests.Unity5/Assets/Demigiant/DOTween/DOTween43.dll.mdb differ
diff --git a/UnityTests.Unity5/Assets/Demigiant/DOTween/DOTween46.dll b/UnityTests.Unity5/Assets/Demigiant/DOTween/DOTween46.dll
index ff9e1bd..530572e 100644
Binary files a/UnityTests.Unity5/Assets/Demigiant/DOTween/DOTween46.dll and b/UnityTests.Unity5/Assets/Demigiant/DOTween/DOTween46.dll differ
diff --git a/UnityTests.Unity5/Assets/Demigiant/DOTween/DOTween46.dll.mdb b/UnityTests.Unity5/Assets/Demigiant/DOTween/DOTween46.dll.mdb
index d5203ff..d396e03 100644
Binary files a/UnityTests.Unity5/Assets/Demigiant/DOTween/DOTween46.dll.mdb and b/UnityTests.Unity5/Assets/Demigiant/DOTween/DOTween46.dll.mdb differ
diff --git a/UnityTests.Unity5/Assets/Demigiant/DOTween/DOTween50.dll b/UnityTests.Unity5/Assets/Demigiant/DOTween/DOTween50.dll
index 68eaf9f..9c38504 100644
Binary files a/UnityTests.Unity5/Assets/Demigiant/DOTween/DOTween50.dll and b/UnityTests.Unity5/Assets/Demigiant/DOTween/DOTween50.dll differ
diff --git a/UnityTests.Unity5/Assets/Demigiant/DOTween/DOTween50.dll.mdb b/UnityTests.Unity5/Assets/Demigiant/DOTween/DOTween50.dll.mdb
index 5417e68..72ab287 100644
Binary files a/UnityTests.Unity5/Assets/Demigiant/DOTween/DOTween50.dll.mdb and b/UnityTests.Unity5/Assets/Demigiant/DOTween/DOTween50.dll.mdb differ
diff --git a/UnityTests.Unity5/Assets/Demigiant/DOTween/Editor/DOTweenEditor.dll b/UnityTests.Unity5/Assets/Demigiant/DOTween/Editor/DOTweenEditor.dll
index fdc3b95..92840ec 100644
Binary files a/UnityTests.Unity5/Assets/Demigiant/DOTween/Editor/DOTweenEditor.dll and b/UnityTests.Unity5/Assets/Demigiant/DOTween/Editor/DOTweenEditor.dll differ
diff --git a/UnityTests.Unity5/Assets/Demigiant/DOTween/Editor/DOTweenEditor.dll.mdb b/UnityTests.Unity5/Assets/Demigiant/DOTween/Editor/DOTweenEditor.dll.mdb
index 9235125..4bf7cb8 100644
Binary files a/UnityTests.Unity5/Assets/Demigiant/DOTween/Editor/DOTweenEditor.dll.mdb and b/UnityTests.Unity5/Assets/Demigiant/DOTween/Editor/DOTweenEditor.dll.mdb differ
diff --git a/_DOTween.Assembly/DOTween/Core/Surrogates/ColorSurrogate.cs b/_DOTween.Assembly/DOTween/Core/Surrogates/ColorSurrogate.cs
new file mode 100644
index 0000000..b1e168e
--- /dev/null
+++ b/_DOTween.Assembly/DOTween/Core/Surrogates/ColorSurrogate.cs
@@ -0,0 +1,66 @@
+using UnityEngine;
+
+#if WP81
+// Author: Daniele Giardini - http://www.demigiant.com
+// Created: 2015/04/15 12:10
+
+#pragma warning disable 1591
+namespace DG.Tweening.Core.Surrogates
+{
+    public struct ColorSurrogate
+    {
+        public float r, g, b, a;
+
+        public ColorSurrogate(float r, float g, float b, float a)
+        {
+            this.r = r;
+            this.g = g;
+            this.b = b;
+            this.a = a;
+        }
+
+        #region Operations
+
+        public static ColorSurrogate operator +(ColorSurrogate v1, ColorSurrogate v2)
+        {
+            return new ColorSurrogate(v1.r + v2.r, v1.g + v2.g, v1.b + v2.b, v1.a + v2.a);
+        }
+
+        public static ColorSurrogate operator -(ColorSurrogate v1, ColorSurrogate v2)
+        {
+            return new ColorSurrogate(v1.r - v2.r, v1.g - v2.g, v1.b - v2.b, v1.a - v2.a);
+        }
+
+        public static ColorSurrogate operator *(ColorSurrogate v1, float f)
+        {
+            return new ColorSurrogate(v1.r * f, v1.g * f, v1.b * f, v1.a * f);
+        }
+
+        #endregion
+
+        #region Conversions
+
+        public static implicit operator Color(ColorSurrogate v)
+        {
+            return new Color(v.r, v.g, v.b, v.a);
+        }
+
+        public static implicit operator ColorSurrogate(Color v)
+        {
+            return new ColorSurrogate(v.r, v.g, v.b, v.a);
+        }
+
+        public static implicit operator Color32(ColorSurrogate v)
+        {
+            return new Color32((byte)(Mathf.Clamp01(v.r) * 255f), (byte)(Mathf.Clamp01(v.g) * 255f), (byte)(Mathf.Clamp01(v.b) * 255f), (byte)(Mathf.Clamp01(v.a) * 255f));
+        }
+
+        public static implicit operator ColorSurrogate(Color32 v)
+        {
+            return new ColorSurrogate((float)v.r / 255f, (float)v.g / 255f, (float)v.b / 255f, (float)v.a / 255f);
+        }
+
+        #endregion
+    }
+}
+#endif
\ No newline at end of file
diff --git a/_DOTween.Assembly/DOTween/DOTween.cs b/_DOTween.Assembly/DOTween/DOTween.cs
index ee7b025..844f1ab 100644
--- a/_DOTween.Assembly/DOTween/DOTween.cs
+++ b/_DOTween.Assembly/DOTween/DOTween.cs
@@ -24,7 +24,7 @@ namespace DG.Tweening
     public class DOTween
     {
         /// <summary>DOTween's version</summary>
-        public static readonly string Version = "1.0.515";
+        public static readonly string Version = "1.0.520";
 
         ///////////////////////////////////////////////
         // Options ////////////////////////////////////
@@ -354,8 +354,13 @@ namespace DG.Tweening
         /// <param name="setter">A setter for the field or property to tween
         /// <para>Example usage with lambda:</para><code>x=> myProperty = x</code></param>
         /// <param name="endValue">The end value to reach</param><param name="duration">The tween's duration</param>
+#if WP81
+        public static TweenerCore<ColorSurrogate, ColorSurrogate, ColorOptions> To(DOGetter<ColorSurrogate> getter, DOSetter<ColorSurrogate> setter, Color endValue, float duration)
+        { return ApplyTo<ColorSurrogate, ColorSurrogate, ColorOptions>(getter, setter, endValue, duration); }
+#else
         public static TweenerCore<Color, Color, ColorOptions> To(DOGetter<Color> getter, DOSetter<Color> setter, Color endValue, float duration)
         { return ApplyTo<Color, Color, ColorOptions>(getter, setter, endValue, duration); }
+#endif
         /// <summary>Tweens a property or field to the given value using default plugins</summary>
         /// <param name="getter">A getter for the field or property to tween.
         /// <para>Example usage with lambda:</para><code>()=> myProperty</code></param>
@@ -416,8 +421,13 @@ namespace DG.Tweening
         /// <param name="setter">A setter for the field or property to tween
         /// <para>Example usage with lambda:</para><code>x=> myProperty = x</code></param>
         /// <param name="endValue">The end value to reach</param><param name="duration">The tween's duration</param>
+#if WP81
+        public static Tweener ToAlpha(DOGetter<ColorSurrogate> getter, DOSetter<ColorSurrogate> setter, float endValue, float duration)
+        { return ApplyTo<ColorSurrogate, ColorSurrogate, ColorOptions>(getter, setter, new ColorSurrogate(0, 0, 0, endValue), duration).SetOptions(true); }
+#else
         public static Tweener ToAlpha(DOGetter<Color> getter, DOSetter<Color> setter, float endValue, float duration)
         { return ApplyTo<Color, Color, ColorOptions>(getter, setter, new Color(0, 0, 0, endValue), duration).SetOptions(true); }
+#endif
 
         #endregion
 
diff --git a/_DOTween.Assembly/DOTween/DOTween.csproj b/_DOTween.Assembly/DOTween/DOTween.csproj
index 75ccfbf..f183c45 100644
--- a/_DOTween.Assembly/DOTween/DOTween.csproj
+++ b/_DOTween.Assembly/DOTween/DOTween.csproj
@@ -71,6 +71,7 @@
     <Compile Include="Core\Enums\UpdateMode.cs" />
     <Compile Include="Core\Extensions.cs" />
     <Compile Include="Core\SequenceCallback.cs" />
+    <Compile Include="Core\Surrogates\ColorSurrogate.cs" />
     <Compile Include="Core\Surrogates\Vector2Surrogate.cs" />
     <Compile Include="Core\Surrogates\Vector3Surrogate.cs" />
     <Compile Include="Core\TweenManager.cs" />
@@ -84,6 +85,7 @@
     <Compile Include="PathMode.cs" />
     <Compile Include="PathType.cs" />
     <Compile Include="Plugins\Color2Plugin.cs" />
+    <Compile Include="Plugins\ColorSurrogatePlugin.cs" />
     <Compile Include="Plugins\Core\PathCore\ControlPoint.cs" />
     <Compile Include="Plugins\LongPlugin.cs" />
     <Compile Include="Plugins\Options\PathOptions.cs" />
diff --git a/_DOTween.Assembly/DOTween/Plugins/ColorPlugin.cs b/_DOTween.Assembly/DOTween/Plugins/ColorPlugin.cs
index 4a101b5..6604d13 100644
--- a/_DOTween.Assembly/DOTween/Plugins/ColorPlugin.cs
+++ b/_DOTween.Assembly/DOTween/Plugins/ColorPlugin.cs
@@ -1,4 +1,5 @@
-// Author: Daniele Giardini - http://www.demigiant.com
+#if !WP81
+// Author: Daniele Giardini - http://www.demigiant.com
 // Created: 2014/07/10 14:33
 // 
 // License Copyright (c) Daniele Giardini.
@@ -72,4 +73,5 @@ namespace DG.Tweening.Plugins
             setter(res);
         }
     }
-}
\ No newline at end of file
+}
+#endif
\ No newline at end of file
diff --git a/_DOTween.Assembly/DOTween/Plugins/ColorSurrogatePlugin.cs b/_DOTween.Assembly/DOTween/Plugins/ColorSurrogatePlugin.cs
new file mode 100644
index 0000000..80d5af6
--- /dev/null
+++ b/_DOTween.Assembly/DOTween/Plugins/ColorSurrogatePlugin.cs
@@ -0,0 +1,74 @@
+#if WP81
+// Author: Daniele Giardini - http://www.demigiant.com
+// Created: 2015/04/15 12:17
+
+using DG.Tweening.Core;
+using DG.Tweening.Core.Easing;
+using DG.Tweening.Core.Surrogates;
+using DG.Tweening.Plugins.Core;
+using DG.Tweening.Plugins.Options;
+
+#pragma warning disable 1591
+namespace DG.Tweening.Plugins
+{
+    public class ColorSurrogatePlugin : ABSTweenPlugin<ColorSurrogate, ColorSurrogate, ColorOptions>
+    {
+        public override void Reset(TweenerCore<ColorSurrogate, ColorSurrogate, ColorOptions> t) { }
+
+        public override void SetFrom(TweenerCore<ColorSurrogate, ColorSurrogate, ColorOptions> t, bool isRelative)
+        {
+            ColorSurrogate prevEndVal = t.endValue;
+            t.endValue = t.getter();
+            t.startValue = isRelative ? t.endValue + prevEndVal : prevEndVal;
+            ColorSurrogate to = t.endValue;
+            if (!t.plugOptions.alphaOnly) to = t.startValue;
+            else to.a = t.startValue.a;
+            t.setter(to);
+        }
+
+        public override ColorSurrogate ConvertToStartValue(TweenerCore<ColorSurrogate, ColorSurrogate, ColorOptions> t, ColorSurrogate value)
+        {
+            return value;
+        }
+
+        public override void SetRelativeEndValue(TweenerCore<ColorSurrogate, ColorSurrogate, ColorOptions> t)
+        {
+            t.endValue += t.startValue;
+        }
+
+        public override void SetChangeValue(TweenerCore<ColorSurrogate, ColorSurrogate, ColorOptions> t)
+        {
+            t.changeValue = t.endValue - t.startValue;
+        }
+
+        public override float GetSpeedBasedDuration(ColorOptions options, float unitsXSecond, ColorSurrogate changeValue)
+        {
+            return 1f / unitsXSecond;
+        }
+
+        public override void EvaluateAndApply(ColorOptions options, Tween t, bool isRelative, DOGetter<ColorSurrogate> getter, DOSetter<ColorSurrogate> setter, float elapsed, ColorSurrogate startValue, ColorSurrogate changeValue, float duration, bool usingInversePosition)
+        {
+            if (t.loopType == LoopType.Incremental) startValue += changeValue * (t.isComplete ? t.completedLoops - 1 : t.completedLoops);
+            if (t.isSequenced && t.sequenceParent.loopType == LoopType.Incremental) {
+                startValue += changeValue * (t.loopType == LoopType.Incremental ? t.loops : 1)
+                    * (t.sequenceParent.isComplete ? t.sequenceParent.completedLoops - 1 : t.sequenceParent.completedLoops);
+            }
+
+            float easeVal = EaseManager.Evaluate(t.easeType, t.customEase, elapsed, duration, t.easeOvershootOrAmplitude, t.easePeriod);
+            if (!options.alphaOnly) {
+                startValue.r += changeValue.r * easeVal;
+                startValue.g += changeValue.g * easeVal;
+                startValue.b += changeValue.b * easeVal;
+                startValue.a += changeValue.a * easeVal;
+                setter(startValue);
+                return;
+            }
+
+            // Alpha only
+            ColorSurrogate res = getter();
+            res.a = startValue.a + changeValue.a * easeVal;
+            setter(res);
+        }
+    }
+}
+#endif
\ No newline at end of file
diff --git a/_DOTween.Assembly/DOTween/Plugins/Core/PluginsManager.cs b/_DOTween.Assembly/DOTween/Plugins/Core/PluginsManager.cs
index 9b0dd59..7ccbbc4 100644
--- a/_DOTween.Assembly/DOTween/Plugins/Core/PluginsManager.cs
+++ b/_DOTween.Assembly/DOTween/Plugins/Core/PluginsManager.cs
@@ -85,10 +85,19 @@ namespace DG.Tweening.Plugins.Core
             else if (t1 == typeof(float)) {
                 if (_floatPlugin == null) _floatPlugin = new FloatPlugin();
                 plugin = _floatPlugin;
-            } else if (t1 == typeof(Color)) {
+            }
+#if WP81
+            else if (t1 == typeof(ColorSurrogate)) {
+                if (_colorPlugin == null) _colorPlugin = new ColorSurrogatePlugin();
+                plugin = _colorPlugin;
+            }
+#else
+            else if (t1 == typeof(Color)) {
                 if (_colorPlugin == null) _colorPlugin = new ColorPlugin();
                 plugin = _colorPlugin;
-            } else if (t1 == typeof(int)) {
+            }
+#endif
+            else if (t1 == typeof(int)) {
                 if (_intPlugin == null) _intPlugin = new IntPlugin();
                 plugin = _intPlugin;
             }
diff --git a/_DOTween.Assembly/DOTween/TweenSettingsExtensions.cs b/_DOTween.Assembly/DOTween/TweenSettingsExtensions.cs
index 3ca3b4b..fec6a2e 100644
--- a/_DOTween.Assembly/DOTween/TweenSettingsExtensions.cs
+++ b/_DOTween.Assembly/DOTween/TweenSettingsExtensions.cs
@@ -682,7 +682,11 @@ namespace DG.Tweening
 
         /// <summary>Options for Color tweens</summary>
         /// <param name="alphaOnly">If TRUE only the alpha value of the color will be tweened</param>
+#if WP81
+        public static Tweener SetOptions(this TweenerCore<ColorSurrogate, ColorSurrogate, ColorOptions> t, bool alphaOnly)
+#else
         public static Tweener SetOptions(this TweenerCore<Color, Color, ColorOptions> t, bool alphaOnly)
+#endif
         {
             if (t == null || !t.active) return t;
 
diff --git a/_DOTween.Assembly/bin/DOTween.XML b/_DOTween.Assembly/bin/DOTween.XML
index 33da8e8..cad8369 100644
--- a/_DOTween.Assembly/bin/DOTween.XML
+++ b/_DOTween.Assembly/bin/DOTween.XML
@@ -35,6 +35,12 @@
         <member name="F:DG.Tweening.PathMode.Sidescroller2D">
             <summary>2D side-scroller path</summary>
         </member>
+        <member name="T:DG.Tweening.Core.Surrogates.Vector2Surrogate">
+            <summary>
+            A surrogate for Vector2/3/4 values to work around Unity's bug when trying to cast to
+            a Vector2/3/4 plugin on WP8.1
+            </summary>
+        </member>
         <member name="T:DG.Tweening.TweenType">
             <summary>
             Used internally
@@ -532,29 +538,29 @@
             <summary>Options for float tweens</summary>
             <param name="snapping">If TRUE the tween will smoothly snap all values to integers</param>
         </member>
-        <member name="M:DG.Tweening.TweenSettingsExtensions.SetOptions(DG.Tweening.Core.TweenerCore{UnityEngine.Vector2,UnityEngine.Vector2,DG.Tweening.Plugins.Options.VectorOptions},System.Boolean)">
+        <member name="M:DG.Tweening.TweenSettingsExtensions.SetOptions(DG.Tweening.Core.TweenerCore{DG.Tweening.Core.Surrogates.Vector2Surrogate,DG.Tweening.Core.Surrogates.Vector2Surrogate,DG.Tweening.Plugins.Options.VectorOptions},System.Boolean)">
             <summary>Options for Vector2 tweens</summary>
             <param name="snapping">If TRUE the tween will smoothly snap all values to integers</param>
         </member>
-        <member name="M:DG.Tweening.TweenSettingsExtensions.SetOptions(DG.Tweening.Core.TweenerCore{UnityEngine.Vector2,UnityEngine.Vector2,DG.Tweening.Plugins.Options.VectorOptions},DG.Tweening.AxisConstraint,System.Boolean)">
+        <member name="M:DG.Tweening.TweenSettingsExtensions.SetOptions(DG.Tweening.Core.TweenerCore{DG.Tweening.Core.Surrogates.Vector2Surrogate,DG.Tweening.Core.Surrogates.Vector2Surrogate,DG.Tweening.Plugins.Options.VectorOptions},DG.Tweening.AxisConstraint,System.Boolean)">
             <summary>Options for Vector2 tweens</summary>
             <param name="axisConstraint">Selecting an axis will tween the vector only on that axis, leaving the others untouched</param>
             <param name="snapping">If TRUE the tween will smoothly snap all values to integers</param>
         </member>
-        <member name="M:DG.Tweening.TweenSettingsExtensions.SetOptions(DG.Tweening.Core.TweenerCore{UnityEngine.Vector3,UnityEngine.Vector3,DG.Tweening.Plugins.Options.VectorOptions},System.Boolean)">
+        <member name="M:DG.Tweening.TweenSettingsExtensions.SetOptions(DG.Tweening.Core.TweenerCore{DG.Tweening.Core.Surrogates.Vector3Surrogate,DG.Tweening.Core.Surrogates.Vector3Surrogate,DG.Tweening.Plugins.Options.VectorOptions},System.Boolean)">
             <summary>Options for Vector3 tweens</summary>
             <param name="snapping">If TRUE the tween will smoothly snap all values to integers</param>
         </member>
-        <member name="M:DG.Tweening.TweenSettingsExtensions.SetOptions(DG.Tweening.Core.TweenerCore{UnityEngine.Vector3,UnityEngine.Vector3,DG.Tweening.Plugins.Options.VectorOptions},DG.Tweening.AxisConstraint,System.Boolean)">
+        <member name="M:DG.Tweening.TweenSettingsExtensions.SetOptions(DG.Tweening.Core.TweenerCore{DG.Tweening.Core.Surrogates.Vector3Surrogate,DG.Tweening.Core.Surrogates.Vector3Surrogate,DG.Tweening.Plugins.Options.VectorOptions},DG.Tweening.AxisConstraint,System.Boolean)">
             <summary>Options for Vector3 tweens</summary>
             <param name="axisConstraint">Selecting an axis will tween the vector only on that axis, leaving the others untouched</param>
             <param name="snapping">If TRUE the tween will smoothly snap all values to integers</param>
         </member>
-        <member name="M:DG.Tweening.TweenSettingsExtensions.SetOptions(DG.Tweening.Core.TweenerCore{UnityEngine.Vector4,UnityEngine.Vector4,DG.Tweening.Plugins.Options.VectorOptions},System.Boolean)">
+        <member name="M:DG.Tweening.TweenSettingsExtensions.SetOptions(DG.Tweening.Core.TweenerCore{DG.Tweening.Core.Surrogates.Vector4Surrogate,DG.Tweening.Core.Surrogates.Vector4Surrogate,DG.Tweening.Plugins.Options.VectorOptions},System.Boolean)">
             <summary>Options for Vector4 tweens</summary>
             <param name="snapping">If TRUE the tween will smoothly snap all values to integers</param>
         </member>
-        <member name="M:DG.Tweening.TweenSettingsExtensions.SetOptions(DG.Tweening.Core.TweenerCore{UnityEngine.Vector4,UnityEngine.Vector4,DG.Tweening.Plugins.Options.VectorOptions},DG.Tweening.AxisConstraint,System.Boolean)">
+        <member name="M:DG.Tweening.TweenSettingsExtensions.SetOptions(DG.Tweening.Core.TweenerCore{DG.Tweening.Core.Surrogates.Vector4Surrogate,DG.Tweening.Core.Surrogates.Vector4Surrogate,DG.Tweening.Plugins.Options.VectorOptions},DG.Tweening.AxisConstraint,System.Boolean)">
             <summary>Options for Vector4 tweens</summary>
             <param name="axisConstraint">Selecting an axis will tween the vector only on that axis, leaving the others untouched</param>
             <param name="snapping">If TRUE the tween will smoothly snap all values to integers</param>
@@ -564,7 +570,7 @@
             <param name="useShortest360Route">If TRUE (default) the rotation will take the shortest route, and will not rotate more than 360°.
             If FALSE the rotation will be fully accounted. Is always FALSE if the tween is set as relative</param>
         </member>
-        <member name="M:DG.Tweening.TweenSettingsExtensions.SetOptions(DG.Tweening.Core.TweenerCore{UnityEngine.Color,UnityEngine.Color,DG.Tweening.Plugins.Options.ColorOptions},System.Boolean)">
+        <member name="M:DG.Tweening.TweenSettingsExtensions.SetOptions(DG.Tweening.Core.TweenerCore{DG.Tweening.Core.Surrogates.ColorSurrogate,DG.Tweening.Core.Surrogates.ColorSurrogate,DG.Tweening.Plugins.Options.ColorOptions},System.Boolean)">
             <summary>Options for Color tweens</summary>
             <param name="alphaOnly">If TRUE only the alpha value of the color will be tweened</param>
         </member>
@@ -1304,6 +1310,12 @@
             and returns the total number of tweens involved.
             </summary>
         </member>
+        <member name="T:DG.Tweening.Core.Surrogates.Vector3Surrogate">
+            <summary>
+            A surrogate for Vector2/3/4 values to work around Unity's bug when trying to cast to
+            a Vector2/3/4 plugin on WP8.1
+            </summary>
+        </member>
         <member name="T:DG.Tweening.PathType">
             <summary>
             Type of path to use with DOPath tweens
@@ -1484,7 +1496,7 @@
             <para>Example usage with lambda:</para><code>x=> myProperty = x</code></param>
             <param name="endValue">The end value to reach</param><param name="duration">The tween's duration</param>
         </member>
-        <member name="M:DG.Tweening.DOTween.To(DG.Tweening.Core.DOGetter{UnityEngine.Vector2},DG.Tweening.Core.DOSetter{UnityEngine.Vector2},UnityEngine.Vector2,System.Single)">
+        <member name="M:DG.Tweening.DOTween.To(DG.Tweening.Core.DOGetter{DG.Tweening.Core.Surrogates.Vector2Surrogate},DG.Tweening.Core.DOSetter{DG.Tweening.Core.Surrogates.Vector2Surrogate},UnityEngine.Vector2,System.Single)">
             <summary>Tweens a property or field to the given value using default plugins</summary>
             <param name="getter">A getter for the field or property to tween.
             <para>Example usage with lambda:</para><code>()=> myProperty</code></param>
@@ -1492,7 +1504,7 @@
             <para>Example usage with lambda:</para><code>x=> myProperty = x</code></param>
             <param name="endValue">The end value to reach</param><param name="duration">The tween's duration</param>
         </member>
-        <member name="M:DG.Tweening.DOTween.To(DG.Tweening.Core.DOGetter{UnityEngine.Vector3},DG.Tweening.Core.DOSetter{UnityEngine.Vector3},UnityEngine.Vector3,System.Single)">
+        <member name="M:DG.Tweening.DOTween.To(DG.Tweening.Core.DOGetter{DG.Tweening.Core.Surrogates.Vector3Surrogate},DG.Tweening.Core.DOSetter{DG.Tweening.Core.Surrogates.Vector3Surrogate},UnityEngine.Vector3,System.Single)">
             <summary>Tweens a property or field to the given value using default plugins</summary>
             <param name="getter">A getter for the field or property to tween.
             <para>Example usage with lambda:</para><code>()=> myProperty</code></param>
@@ -1500,7 +1512,7 @@
             <para>Example usage with lambda:</para><code>x=> myProperty = x</code></param>
             <param name="endValue">The end value to reach</param><param name="duration">The tween's duration</param>
         </member>
-        <member name="M:DG.Tweening.DOTween.To(DG.Tweening.Core.DOGetter{UnityEngine.Vector4},DG.Tweening.Core.DOSetter{UnityEngine.Vector4},UnityEngine.Vector4,System.Single)">
+        <member name="M:DG.Tweening.DOTween.To(DG.Tweening.Core.DOGetter{DG.Tweening.Core.Surrogates.Vector4Surrogate},DG.Tweening.Core.DOSetter{DG.Tweening.Core.Surrogates.Vector4Surrogate},UnityEngine.Vector4,System.Single)">
             <summary>Tweens a property or field to the given value using default plugins</summary>
             <param name="getter">A getter for the field or property to tween.
             <para>Example usage with lambda:</para><code>()=> myProperty</code></param>
@@ -1516,7 +1528,7 @@
             <para>Example usage with lambda:</para><code>x=> myProperty = x</code></param>
             <param name="endValue">The end value to reach</param><param name="duration">The tween's duration</param>
         </member>
-        <member name="M:DG.Tweening.DOTween.To(DG.Tweening.Core.DOGetter{UnityEngine.Color},DG.Tweening.Core.DOSetter{UnityEngine.Color},UnityEngine.Color,System.Single)">
+        <member name="M:DG.Tweening.DOTween.To(DG.Tweening.Core.DOGetter{DG.Tweening.Core.Surrogates.ColorSurrogate},DG.Tweening.Core.DOSetter{DG.Tweening.Core.Surrogates.ColorSurrogate},UnityEngine.Color,System.Single)">
             <summary>Tweens a property or field to the given value using default plugins</summary>
             <param name="getter">A getter for the field or property to tween.
             <para>Example usage with lambda:</para><code>()=> myProperty</code></param>
@@ -1551,7 +1563,7 @@
             <para>Example usage with lambda:</para><code>x=> myProperty = x</code></param>
             <param name="endValue">The end value to reach</param><param name="duration">The tween's duration</param>
         </member>
-        <member name="M:DG.Tweening.DOTween.ToAxis(DG.Tweening.Core.DOGetter{UnityEngine.Vector3},DG.Tweening.Core.DOSetter{UnityEngine.Vector3},System.Single,System.Single,DG.Tweening.AxisConstraint)">
+        <member name="M:DG.Tweening.DOTween.ToAxis(DG.Tweening.Core.DOGetter{DG.Tweening.Core.Surrogates.Vector3Surrogate},DG.Tweening.Core.DOSetter{DG.Tweening.Core.Surrogates.Vector3Surrogate},System.Single,System.Single,DG.Tweening.AxisConstraint)">
             <summary>Tweens only one axis of a Vector3 to the given value using default plugins.</summary>
             <param name="getter">A getter for the field or property to tween.
             <para>Example usage with lambda:</para><code>()=> myProperty</code></param>
@@ -1560,7 +1572,7 @@
             <param name="endValue">The end value to reach</param><param name="duration">The tween's duration</param>
             <param name="axisConstraint">The axis to tween</param>
         </member>
-        <member name="M:DG.Tweening.DOTween.ToAlpha(DG.Tweening.Core.DOGetter{UnityEngine.Color},DG.Tweening.Core.DOSetter{UnityEngine.Color},System.Single,System.Single)">
+        <member name="M:DG.Tweening.DOTween.ToAlpha(DG.Tweening.Core.DOGetter{DG.Tweening.Core.Surrogates.ColorSurrogate},DG.Tweening.Core.DOSetter{DG.Tweening.Core.Surrogates.ColorSurrogate},System.Single,System.Single)">
             <summary>Tweens only the alpha of a Color to the given value using default plugins</summary>
             <param name="getter">A getter for the field or property to tween.
             <para>Example usage with lambda:</para><code>()=> myProperty</code></param>
@@ -1821,6 +1833,12 @@
             <summary>Continuously increments the tween at the end of each loop cycle (A to B, B to B+(A-B), and so on), thus always moving "onward".
             <para>In case of String tweens works only if the tween is set as relative</para></summary>
         </member>
+        <member name="T:DG.Tweening.Core.Surrogates.Vector4Surrogate">
+            <summary>
+            A surrogate for Vector2/3/4 values to work around Unity's bug when trying to cast to
+            a Vector2/3/4 plugin on WP8.1
+            </summary>
+        </member>
         <member name="T:DG.Tweening.Tweener">
             <summary>
             Animates a single value
diff --git a/_DOTween.Assembly/bin/DOTween.dll b/_DOTween.Assembly/bin/DOTween.dll
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diff --git a/_DOTween.Assembly/bin/DOTween.dll.mdb b/_DOTween.Assembly/bin/DOTween.dll.mdb
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diff --git a/_DOTween.Assembly/bin/DOTween43.dll b/_DOTween.Assembly/bin/DOTween43.dll
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diff --git a/_DOTween.Assembly/bin/DOTween46.dll b/_DOTween.Assembly/bin/DOTween46.dll
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diff --git a/_DOTween.Assembly/bin/DOTween50.dll b/_DOTween.Assembly/bin/DOTween50.dll
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index 5417e68..72ab287 100644
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diff --git a/_DOTween.Assembly/bin/Editor/DOTweenEditor.dll b/_DOTween.Assembly/bin/Editor/DOTweenEditor.dll
index fdc3b95..92840ec 100644
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diff --git a/_DOTween.Assembly/bin/Editor/DOTweenEditor.dll.mdb b/_DOTween.Assembly/bin/Editor/DOTweenEditor.dll.mdb
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