Andy,
I’m sorry to hear about your Quaverato issue. By the symptoms, it does sound like the microcontroller is damaged. You can try to re-flash it if you can borrow a PC, but if the microcontroller has been badly damaged it may not be flashable anyway. Otherwise, you can either get another microcontroller from us (contact us via email: info “at” zeppelindesignlabs.com). If you are into building electronics, you may have another atmega328p around, which you can flash with our software…if you can borrow a PC. If that sounds like too much of a headache, contact us and we’ll sell you a new microcontroller.
Once again, sorry for the trouble.
-Brach