How do I switch music that was accidentally categorized as audiobooks back to music?

I was moving some audiobooks from the Music section to the Audiobooks section by selecting them and going to Get Info>Options>Media>Audiobooks. I must have accidently selected a bunch of my music which is now showing up in the audiobooks section. I tried to do the reverse to move them back but nothing is happening. It will let me select the album and choose Media>Music and select "OK" but it doesn't move anywhere. HELP