Also in the discovery dialog, here's one that's been around for a handful of versions:

Specifying only a specific address doesn't work: JEmplode still finds my colleagues' players and makes me choose.

And while we're here, syncing with only changes to config.ini used to be very, very quick. Now it does a database rebuild and reboots the player as well. Not quick. I'd edit over FTP if I could get it to work neatly with Tramp.