I updated Lightroom and ALL of my backups and catalog files were GONE. I was able to recover them in Backblaze (I think I'm missing some edits, but the majority are still there). I'm not going to say it's the update but my experience is like everyone else who has posted - always backed up upon exiting Lightroom, Lightroom opened up as if it was brand new after an update and NO lrcat files were there, NO backups were found, and thank goodness for an automated backup system. I'm using a Windows PC and have Lightroom CC.
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