Fantastic! So pleased you could recover some of your data. :)
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Please dont rename the backups as db.xml
Make a copy of the backup and rename the copy as db.xml
If something on your system is crashing/corrupting the db.xml you dont want to nuke all your backups before you resolve the issue
Also make sure you aren't pointing your live data folder ay a synced folder location like OneDrive or Drive, or Dropbox. You can manually copy the campaign data back and forth into a synced location. But your actual campaign folder needs to be somewhere else.