I wrote a quite detailed message to EVGA Support describing the problems that I was having. EVGA is under the impression that there are no problems with Unleash and Windows 10.
The software itself works fine in Windows 8 Compatibility Mode. The taskbar monitor doesn't. There were a few other problems, as well, but I'm not going to repeat my entire email here.
I tried it with both Windows 10 Build 10240 and Build 10532 with the same results. The current version was released back in March, a long time ago in Windows beta terms. The download page did rate it for Windows 8 but not Windows 10, although that rating is no longer on the Download page.