If your FF800 is performing well on your system, "if it isn't broken, don't fix it" is a good policy :-)   If you need compatibility with a newer operating system (was your FF issued before Windows 7?) or you want new features (download the latest driver package and look at the readme file) I suggest you update.   Later versions require the new firmware.  If you can follow simple instructions, you have nothing to fear.

I sometimes wonder if most of the people who report disaster from firmware updates have done something silly  like pulling the power half-way through the process, just to see what happens :-)