hopefully you enabled autosave and/or backup in the C2 settings
The autosave is in the same folder as you project
and the backups wherever you choose it to be (settings)
I checked both autosave and backup, for some reason caproj was corrupted on both as well. I only lost like 2 hours of work so I'm almost back at where I was before, but it's always nice to know if there are any solutions in case this happens again