Man I don't know why everyone has problems! Lol.
I can take a fresh board, clear epprom and flash firmware in like 3 min max.
Then takes me only maybe 4-5 to do the "gui".
My buddy has a hard time too! He is a few hrs away so hard to see what's going on with his stuff.
I use the usb programmer that came with my Remzibi OSD! So far "knock on wood" I've never experienced these issues others have.
Maybe I've just been lucky! Dunno.
I never touched "arduino" until messing with minimOSD and originally installing the "KVOSD".
I know I did a ton of reading and research prior to ever trying to flash/use the thing. Lol.