I've had my unit for a couple years now, before v2 I think, SN ATM-13-01-0059 and haven't had any problems with it until today. It won't receive any MIDI messages and I've changed the MIDI channel multiple times (via the YT tutorial). I've never hacked it. Makes noise when I push the 2nd rotary knob but just won't receive MIDI notes. Any suggestions? Is there are simple factory reset I can do? Any help would be greatly appreciated as I love this unit!