Hey Alex,
Im glad I stumbled on this thread. I bricked mine too, then got all disorganized, had beers, tried again, accidentally deleted the license folder, and now Im up shits creek without a paddle. Ive contacted Paint Audio support and they are non responsive. I ran into the same problem with memory and kept trying. I can get it booted only into USB mode.
How did you do the reformat? Also, Im exclusively on a mac, but I can work around the disk utility to try and reformat it. Just wondering what you reformatted the disk as. It seems like its a Linux Rasberry Pi, just wondering what you did to reformat.
Hopefully I can get it working without the license file, or hopefully they provide me with a new file. I dont know, but I'm feeling dumb.