What version of DM are you running? i would recommend that you have DM version 4.2, SP 2, or DM version 4.3, some people find 4.3 a bit buggy, but you may find different.
On the handheld OS, if your device is working well, no issues, leave it be. Otherwise, look at the top of the 83xx section here at the Sticky Notes for the latest version and instructions of your handheld OS.
running 4.2 for s system software, and the only problem i had was yesterday i got app error 523 but i removed a theme and BBsmart and it came back up. DOnt know which one was the problem?