Hi All,
I have been trying to figure this out for the better part of the day, where any firmware update attempt would be stuck at 0%, seemingly forever.
A little trolling on the internet, and the answer is to quickly unplug and plug back in your USB device, while the unit is trying to update. Within about a minute, the update started.
This worked for me in both downgrading and upgrading firmware.
Hope this saves you troubleshooting effort,
clee600


