Nope, just Win10. Today I did not have any issues with the Fearsome Fists CCOR Patch master, but the only thing that changed was that I had the KPH 4.0.1 patch installed, then when I disabled that patch and re-enabled the 4.2.3 patch, it no longer complained of the missing master. Plugins were enabled in the right pane and had been sorted with LOOT.
Perhaps a temporary glitch with MO2, otherwise I obviously did something to cause it, but I'm not sure what. Computers are frustrating...
Thanks for the help, I appreciate it.