¿Firmare Upgrades Backward Compatible?

I have recently bought the new Plextor 2410A recorder, and I’ve the doubt if a Firmware Upgrade is backwards compatible, I mean that I don’t know if it’s posible to upgrade to v1.02 and if you don’t like the result (not Safedisc II recording), you can again flash the v.101 Version. (Although I know v.102 also does safedisc II, but don’t know what will happen with future updates).

¿Does anybody know if this can be done?