Is there a way to have Rekordbox recalculate autogain?

Originally I tried autogain in Rekordbox which was all over the place as far as reliability, but then I normalized the volume levels of most of my songs elsewhere manually.  The problem is that there is a few that aren't quite the same volume, and I'd like to use and set my own autogain on these few songs, but because Rekordbox previously set autogain levels for ALL of my songs, it messes up the volume of my normalized songs.  Can I somehow wipe the current autogain information that is currently in the database?