RB 4.0.6 - Can't Edit Tracks in Pro Link

I just updated to Rekordbox 4.0.6 on Mac and now all of my track attributes seem to be read-only.

I can assign star ratings, but I can't edit comments, titles or artist on tracks that I had modified with 4.0.5.

EDIT:  Woops.  It turns out you can't edit songs when you have Pro Link enabled.  I went to shut everything down and suddenly my tracks were edit-able again.

I guess I will go make a feature request: Allow editing of track data while ProLink is enabled.  It would be really nice to make a comment about a song while it's playing.