Everything disappeared!

This evening, the actions on one of my projects stopped working, without me having touched anything. Simple actions (opening the calendar or clock). I then went to edit but the actions were still present.

I saved and tried again, but nothing happened.

I tried changing the action, but the issue Is the same.

I then tried loading the default wallpapers from the official libraries, same result.

The absurd thing is that, when I tried to reload my projects, they were all completely gone! Only empty files remained in the directory where they were saved. I practically lost all my efforts without having done anything special other than loading a file from the official libraries.

Obviously, I have the full version of the software. I doubt I'll be able to recover anything, unfortunately.

Has anyone had similar problems?