I bit the bullet and did the Windows 10 upgrade on the main radio computer tonight. It went relatively smoothly, though I did have to download new drivers for both my AMD and Nvidia graphics cards to get Win 10 to recognize all 3 monitors. After reinstalling SSDR, (I'd done a full Revo uninstall), SSDR came up fine on the 6500, but couldn't find the Flex Control. I tried moving it to Port 99, but still no go Powered everything off with the Flex Control disconnected, powered it back up, plugged in the FC and back to operational. I started bringing up my suite of normal programs. The only one that gave me an error was CW Skimmer, though it seemed to be working. It later gave me more problems, so I did a Revo uninstall of it, and downloaded and reinstalled and everything is fine there. The one issue I'm still having is that SSDR leaves a 3/4" gap at the bottom of the screen on my big 27" AOC monitor when I maximize it, and I'm unable to stretch it past that point if I try to resize it. It's the only program that happens with....the browsers, both Chrome and the new 'Edge', all maximize to the top of the task bar....which now appears on all 3 monitors, so I'll post this as an SSDR software related issue. I have also seen one other instance of the Flex Control getting lost, but unplugging and replugging it in seems to cure it. FWIW, the normal operating environment includes SSDR, DDUTIL, SmartBridge, CW Skimmer, HRDRotor and HRDLog, as well as FR Stack, with SSDR on the center monitor and the others spread across the flanking 19-inchers.