whenever i try to commit any sprites or spritesheets in the SpriteCollection editor i get this:
ArgumentException: Invalid path
System.IO.Path.GetDirectoryName (System.String path) (at /Applications/buildAgent/work/b59ae78cff80e584/mcs/class/corlib/System.IO/Path.cs:215)
tk2dSpriteCollectionBuilder.GetOrCreateDataPath (.tk2dSpriteCollection gen) (at Assets/TK2DROOT/tk2d/Editor/Sprites/tk2dSpriteCollectionBuilder.cs:440)
tk2dSpriteCollectionBuilder.Rebuild (.tk2dSpriteCollection gen) (at Assets/TK2DROOT/tk2d/Editor/Sprites/tk2dSpriteCollectionBuilder.cs:490)
tk2dSpriteCollectionEditorPopup.Commit () (at Assets/TK2DROOT/tk2d/Editor/Sprites/SpriteCollectionEditor/tk2dSpriteCollectionEditorPopup.cs:437)
tk2dSpriteCollectionEditorPopup.DrawToolbar () (at Assets/TK2DROOT/tk2d/Editor/Sprites/SpriteCollectionEditor/tk2dSpriteCollectionEditorPopup.cs:427)
tk2dSpriteCollectionEditorPopup.OnGUI () (at Assets/TK2DROOT/tk2d/Editor/Sprites/SpriteCollectionEditor/tk2dSpriteCollectionEditorPopup.cs:826)
System.Reflection.MonoMethod.Invoke (System.Object obj, BindingFlags invokeAttr, System.Reflection.Binder binder, System.Object[] parameters, System.Globalization.CultureInfo culture) (at /Applications/buildAgent/work/b59ae78cff80e584/mcs/class/corlib/System.Reflection/MonoMethod.cs:222)
for the record im on Windows 8 32-bit and im using unity 4.1.2f1 and the most recent version of 2D Toolkit (i just downloaded it from the asset store). help please