Do I need to update my GRE PSR-500 scanner.
Showes.
uP Boot Ver:1.0
uP Appl Ver: 1.8
"Need to" ?
That's up to you to decide. If your scanner works just fine for the systems that you monitor, then you don't "need to" upgrade. I know several Pro106 owners who have never upgraded the firmware (from uP Ver 1.6, AppVer 1.3, VocVer 1.0) because the scanners do just fine for the systems they monitor. (Pro 106/197 and GRE 500/600 are the same scanners basically; though they have different and not interchangeable firmware files)
"Can you"?
You certainly can if you wish, as mentioned in the posts above. An option you might consider, is to acquire the firmware files now while they are still available, so that you can upgrade in the future if you find that you later "need to".
Some other threads have discussed the changes that the firmware makes, and whether or not the upgrade improved (or hurt) the scanner's performance. Maybe they will help you determine whether you "need to" for the systems that you monitor.
Caution
If you do choose to upgrade, be sure to get the correct file for your scanner. DonS explains in
this thread that If you use the wrong file, the scanner likely will become a useless "brick".
Hope this helps,