Hi, I believe I have a corrupt .APRX file and am looking for any help on how to restore it. On Thursday, during its automatic backup process, the program became stuck and I couldn't save my file. When I looked for information on how to troubleshoot, one piece of advice on the internet said to investigate the .backups folder, which I did, but mistakenly assumed that deleting the files in that folder might help me unstick the automatic backup and save. It did not, and instead now my project folder seems to be corrupted, showing this message:

I used the newest version of ArcGIS for this project, so there's no way it was saved using a newer version. I am trying to contact my IT Admin to see if the folder (which is a Dropbox folder) can be restored from a date of before Thursday, but since it is the weekend, trying to fix it myself. Anyone have any suggestions?