Firmware starting 02. means you have a ‘hardware revision 2’ device. You can not install 01. firmwares on it and it would not help anyway.
Rockbox only works on ‘hardware revision 1’ devices (the original Fuze). There is little movement on getting Rockbox to work on the ‘revision 2’ hardware because the hardware is different and I don’t think any of the active developers have a ‘revision 2’ device.
