What's the proper way to do this? If I make a copy of the project from Unity 2017, then open it in Unity 2018, the project has ProBuilder Advanced 2.9.8f3 still installed. Deleting the ProCore folder breaks all the ProBuilder objects in the scene. I assumed you'd have to uninstall the old version before installing version 3.0.9 from the Package Manager. Or does the new version take care of uninstalling the older version/keep the PB objects intact? How are you supposed to update ProBuilder in general?