I’ve submitted the form to WordPress.org requesting access to their svn to release the Chords and Lyrics publicly.
I’ve removed the old widget, and replaced it with an options page in the Users admin menu. Since this is per-user configurable, I thought that the Users menu was the correct place. But upon rethinking this, I think the correct place is under Appearance. I can easily move it if someone explains to me why another menu would be better 
I’ll post an update when it goes live.