This looks like a bug that was introduced recently. I'll get a fix in place immediately. Your database is fine - don't make any further changes. You may want to revert to an earlier point under Settings->Backup and Restore->Restore Automatic Database Backup to restore the database from before any modifications you made. You can also backup the library under Settings->Backup and Restore->Backup Library. After the update is available, it will fix this issue with the keys not showing up. Just to be clear - your keys have not been deleted, they are just not being read out of the database properly. Thank you for reporting the issue and sorry I didn't respond sooner (I was working all day on getting updates put together and submitted).
Mike
Mike