I don't know if it's necessary or not. It may be a safety precaution to make sure everything is in order after the firmware changes. If you do the reset (assuming you haven't already), I'd suggest taking a couple minutes to jot down your existing settings for the inputs, distances, bass management, speaker trims, and surround configuration. It's useful stuff to have tucked away somewhere (maybe in a text file on your PC or a sheet of paper tucked somewhat out of the way).