I tried with steps listed below :
1. "uninstall" Rockbox with the RB Utility ( rockbox folder no longer exist, but file fuzea.bin stil sits on root dir )
2. place the stock firmware (fuze01.02.31.bin) on root
3. reboot original firmware by pressing and hold the Left button while turning on the player
Left button while turning on the player = able to boot up the original firmware
Normal turning on the player = Loading firmware, File not found > Plug USB cable
I am still able to start up the original firmware, but I have to press and hold the Left button while turning on the player on every time, is this normal ?
Or am I missing something on uninstall process ?