@jeffweber Don't import only some part of DOTween, otherwise you will break it The setup will take care to organize it correctly each time. The Unity 5 dlls only contain methods that work from Unity 5+. DOAnchorPos is on the DOTween46 dlls, while sprite shortcuts are on the DOTween43 ones. In short, if you're on Unity 5, you will need all the dlls none excluded. Instead, for eaxmple, if you're on Unity 4.6 you'll need all dlls except DOTween50 (but again, the setup will take care of unpacking/deleting the correct ones).