Kinda have the same problem now. Recieved my MOD today, played around a bit.
After turning on again now it's stuck on the loading screen (left: logo, right: "MOD DUO"). Only thing i did differently was connecting a second USB-Device (Footswitch) while connected to the computer via USB as well before turning off.
Sorry if my "bug report" doesn't fit the requirements, just wondering if you can give me some quick pointers. Thanks!
Edit: After 1 day, still stuck on the loading screen. Pressing the left knob+button doesn't do anything for me. Can't figure out any way to reset my MOD. I was so eager to play with it.... bummer. i really hope anyone can help me.