[AnotherAnders]

I made a stupid mistake in a bulk edit of metadata which meant that Calibre would change the author and the tags for all my books, instead of the few I had intended. Due to very poor performance (from competition from other apps) I aborted Calibre during the edit process with the Windows task manager, thinking that any damage didn't matter because I would have to restore a backup of the library anyway. But restarting Calibre before I restored the backup, I cannot see any changes having taken effect. Everything seems exactly as before I started the bulk edit. A library check doesn't signal any errors either.
My question is: can I trust that everything is OK and continue with the current library, or should I restore the backup (losing all updates I made in the last two weeks).