I have 2 hopper with sling receivers both running the S544 software and I do not have any problems. If the software was the problem why do I not have any problems? Plus I don't have to unplug my disk drives to get the new guide to work. And I did not have to delete any timers. I continually read about problems with the new interface and don't see any problems with my units. Sent from my KFGIWI using the SatelliteGuys app!