Video Calibration Won’t Hold

Weird problem…

Windows 10 user, Kodi Krypton RC2.

I go HDMI out to a TV, so I’ve always needed the video calibration tool. When I installed RC2 the other day, needed to redo the calibration…no big deal. But, the big deal is now I need to do it every time Kodi starts up. Kodi doesn’t seem to keep/save the calibration settings.

Am I missing something or messing it up? Perhaps is this an RC problem (I doubt that because I was running an alpha build for a couple of weeks at least and didn’t notice the problem)? Any advice would be appreciated.