Should always backup “major” projects, regardless of SN telling you. Even if you save the project as #2,#3,#4 for example. Any major animater will have varies files of the same project to ensure no loss from, corruptions, updates, messing the project up. It always sucks losing files when u have worked on them for a while. Learn from the experience tho ALWAYS have backups. I’m sure ralph is working on a hot fix for several issues from 2.4.1. Don’t delete the file maybe the fix will allow you to open it. I haven’t had any issues with opening my projects after re enabling app storage permissions for stick nodes.

I also ran into the same problem too. There is just one solution for this problem, The solution is to reinstall 2.4.1 again and export it on that specific version and make a part 2 of the project. If you have stickfigures imported in that project that aren’t in your library then save it to your library before going back to 2.4.2. I hope this helps.