Bug / Crash Obi Cloth particle editor doesn't work

[Ritstyle]

Ok i think i found the culpit error, when i install Obi cloth it gives this error:

InvalidCastException: Specified cast is not valid.
Obi.ObiActorBlueprintEditor.OnEnable () (at Assets/Obi/Editor/Common/Blueprints/ObiActorBlueprintEditor.cs:62)
Obi.ObiMeshBasedActorBlueprintEditor.OnEnable () (at Assets/Obi/Editor/Common/Blueprints/ObiMeshBasedActorBlueprintEditor.cs:31)
Obi.ObiClothBlueprintEditor.OnEnable () (at Assets/Obi/Editor/Cloth/Blueprints/ObiClothBlueprintEditor.cs:39)