Sentinel software did a Firmware update today when I checked it. I simply did a database update check and a firmware update check; the firmware did download and I noticed that it installed a new version on my 536.
The newest firmware version I have now is: 1.09.02
Some kind of crap posting was on here last night; had a bunch of web addresses that didn't make any sense.
So I take it there isn't a firmware update released for the 536?
There has been a firmware update available through Sentinel to enable Provoice reception capabilities on the 436 and 536 scanners. UPMan has also released a downloadable BETA firmware (not available through Sentinel yet) to enable DMR reception capabilities on those same scanners.
Note that those updates only give your scanner the capability of having those 2 new reception formats added. You will need to purchase a $50 digital key from Uniden to activate each of those newly available reception modes if you wish to use them.