OK so, last night I tried a firmware update on a friends PC that still has windows XP, works every time. MCT works both ways too. Weird. I noticed in XP it shows up as "USB Audi Device" but in Win 7 its "Megadrum USB MIDI". Wonder if that has anything to do with it?
I now have an issue with the LCD contrast though. The contrast is so low I can barely read it. It's normal when booting to firmware update screen, but main screen is hard to read. The contrast was fine with the firmware I had on it previously. How is contrast controlled with the newer firmwares?