As of Unity 2019.3, the new Asset Import Pipeline is the default for new projects. We want users of the Unity Anima2D asset to be aware that it is not compatible with AssetDatabase v2. This means upgrading a project to versions of Unity that use AssetDatabase v2 by default are going to result in errors. What can you do? There are 3 ways forward, each one being valid depending on the phase of development that you’re in: 1. Remain in Unity 2018.4 2. Remain at a version of Unity 2019.x where AssetDatabase v1 is still available 3. Make the switch to using Unity 2D Animation tooling to help us consolidate our efforts and make it better. Let us know if you have more questions and we will do what we can to help.