I've restored timers (settings, etc) multiple times with no problem. One problem I have had happen is it restores an "old" set of settings. Knowing a receiver was being replaced, I would do a lot of cleaning up of timers, sometimes getting rid of 50% of them, then I did a back-up. When I restore things, it brings back all of those timers that should have been removed. The 'back-up' didn't indicate any problem like the back-up failed, so I don't know if it keeps multiple copies and restores the oldest or what.