Firmware update failure
I tried to do a firmware update on my Rostock Max v3 and the main window hangs. In the terminal I got a "file/directory not found" for avrdud.exe. It seems like MC is expecting that file to be in /usr/lib/mattercontrol when it is actually in /usr/lib/mattercontrol/avrdude_files. I then looked in avrdude.exe and it looks like it is trying to get a file from git-lfs.github.com. Following that trail the file didn't exist. Not sure where to go from here.
Sorry, its not setup to work on Linux. It's looking for avrdude.exe as if it were on Windows. I'll file a bug report. In the meantime, you should be able to make it work by installing avrdude as you normally would on your distribution, then make a symlink from