I always forget how to do this, so I wrote some notes.
Erase Memory Card:
Camera on > Menu OK > Left > down at the bottom
See existing firmware:
Hold Disp/Back button and Switch Camera On
Go to fuji site download latest firmware on computer,
put file on memory card via computer.
Battery full charged > put memory card in camera.
Hold Disp/Back button and Switch Camera On again.
Should see ‘Firmware Upgrade’ > OK > OK
WAIT!!! Don’t do anything with camera whilst it’s updating.
Should see confirmation when it’s done.
Turn off, voila!