There is no firmware uninstall , as the firmware is essentially the Fuze’s operating system. You can, however, replace it with the previous version, or any desired version, for that matter.
Here are some handy links. Follow the manual installation instructions.
Fuze+ 01.29.03 firmware link
Fuze+ 01.27.02 firmware link
The current firmware build is sailing along fine on my machine. Well, all except a few wee kinks on the list. What kind of difficulties are you experiencing? Describe the type of videos you are trying to load, and your steps tried, and we can go from there.
The refresh time when starting up will no doubt be addressed. I have crossed more than one pair of fingers, hoping for good juju.
Bob 
