Whenever an automatic firmware update is started, the Editor saves the memory contents backups at these locations, depending on the OS:
- Linux:
~/.local/share/Blokas/Midihub Editor/ - macOS:
~/Library/Application\ Support/Blokas/midihub-editor/(Paste this into Finder → Go → Go to Folder) - Windows:
%LOCALAPPDATA%\Blokas\Midihub Editor/(Paste this into Start → Run)
You can try importing the contents by going to Device → Import Everything… and picking one of the .mhd files.