If you’re willing to try the latest Release: 2.0.4.34 (canary) 2019-11-05, it seems quite good except for the Stop button, and might be able to rebuild database from backup quickly. Might be worth a try if you would prefer not starting backups from scratch, i.e. if old versions have some value. I think Recreate is somewhat simpler than what Repair tries to do, so there might be fewer reasons for it to have trouble.
You lost all databases already, right? Upgrade would have upgraded them (making downgrade hard), however if they’re gone then you either try to Recreate from backup, or start the backups from scratch. Changing Settings back to Beta channel updates would probably be a good idea, to be conservative…