2) Right click in the white area of "Animations"
3) Try to select the animation "Default" (only right click on item work)
Also in the animation window, if you move a animation into a folder, you can't move the element in the root path.
Add new animation outside of the folder then move the element out of the folder.
Please look at the items keyword: "multiple selection" what triggers a misbehavior, e.g., delete.