How do I Move characters from old projects to new ones

Im trying to move one of my old characters from a previous game to my next one, but I cant copy paste it. Does anyone know how to move assets from one project to another?

In the animations editor, you can save animation frames to disk, and then import them again to your new project, if you don't have the original files anymore. If you have the original files, just import them like you did the first time.

You should be able to open both projects and copy a sprite from project 1 and paste into project 2.

I have done it