Hi @FimpossibleGames ! We just updated to v.1.0.91, and trying to make a build results in the following two compiler errors: Assets/FImpossible Games/Look Animator/FLookAnimator.cs(15,88): error CS0246: The type or namespace name `IFHierarchyIcon' could not be found. Are you missing an assembly reference? Assets/FImpossible Games/FBasic Assets/Editor Tools/FPropDrawers_MinMaxSlider.cs(68,5): error CS0246: The type or namespace name `BackgroundColorAttribute' could not be found. Are you missing an assembly reference? Is there an assembly definition file missing for the Editor Tools? Otherwise the Slider script above doesn't have any if defines blocking out the editor code. Thanks for you help!