Fret not dear sir, when beta 11 came out, both of my empegs were away at Davids being fixed. I had to wait nearly a whole week before I got them back. Needless to say I had the upgrade files and emplode downloaded and ready to go.
I've got 13 on now, and honestly can't tell the difference! I've not seen any new features jump out at me yet! You never know 13 could hose your player (which I doubt very much) and you'll be the only one with your FIDs intact! (oo er!!!)