Hi Simon.I was on a very very old version 0094 I think, had issues with DAB disappearing, not being able to change out of Eco driving mode etc.
You can try an emergency recovery, and reinstall the images of the firmware.I did it, I went to a service, they tried all the possible. My (and your problem) problem has not solution in an official way.
I'll try now with a third part solution (hacking, bypass, etc etc).
Hey hey, can you explain how he downgraded the firmware. I am also able to connect it to an FTDI if that is required. I have knowledge in this segment but would need to know what I can feed the terminal to accept a downgrade.finally solved!!!
I'dont know how he did, but someone made a downgrade of the discover pro, at the 0200. Really with that the discover was mute, absolutely mute. So I tried to install the 0388 one and now all the system works. I've still the known bug of the low quality sound after the 50% volume but know I switch on the car and the discover sounds, without searching update, simply sounds.