Supposedly, SmartSDR CAT works on SmartLink. But not for me. When I am on my home LAN, everything works -- SmartSDR CAT shows "Radio Connected", and DX4Win talks to it with no problems. However, when I am away from home using SmartLink, CAT shows "Radio Not Connected" and, of course, DX4Win can no longer talk to the radio -- it just times out. SmartSDR and the radio work flawlessly, just with no CAT.
SmartSDR v2.0.17, Flex-6500, Windows 10 (latest updates) on all computers. I have completely uninstalled all Flex software and reinstalled it, to no avail.