Should I have my computer re-flashed at the dealer from time to time for new updates, TSB's, changes, etc?

Call on star. They can do a diagnostic while your driveing.

I dont have any problems (that I know of), I was just wondering as sort of a maintenance thing from time to time.

If its not broke don't fix it. The fix sometimes is worse than what it is like less fuel mileage ect.