JHymn is the new Hymn
It looks as though JHymn is the only supported version of hymn left, at least, according to the hymn forums.
JHymn has a lot more flexibility than hymn did, but doesn’t seem to have a command line interface, which makes it difficult to integrate into a script. That said, it does have functionality to back up your protected music to a new location once it’s scrubbed of DRM, so it sort of does what my M4P Backup script did anyway.
I’ll have to get this thing running, then I’ll share my settings with the rest of you.