I do.
I know I heard the demo mode once, but I just went through the manual and it doesn't mention it.
Maybe hold demo while you turn it on? Mine is in storage and I don't want to haul it out. Truthfully I always hated those demo modes in anything I bought as it was always too loud, with tons of notes and unmusical.
Another idea is to phone Alesis and ask them, the phone number in the manual is 310-836-7924 (CA). Maybe their site would have a current phone number if that one's old.
good luck