Anima2d disappears from window.......cant find anima 2d options anymore...plz help

anima2d suddenly stopped working…cant even reimport it properly…all the anima 2d options are gone…

I have a similar problem…Opened Unity today, and all of the added Windows (Cinemachine, Anima2D etc.) are gone. I have no idea how it could have happened. Tried reimporting Anima2D like 5 times (it’s the most important for the project).

I am using Unity 2018.3.9f1 and have been putting off updating to Unity 2019 exactly because I didn’t want to risk any data loss or compatibility issues.

What should we do?