Update...

I uninstalled and reinstalled MACH, still no Hotkeys.

I changed to the standard MILL XML file, and Hotkeys work.

I went to the XML backup folder. There IS a change in the file size yesterday... BUT, when I use an older XML backup (from December) as a profile, it still doesn't work...

So, I guess I can rebuild the XML from the standard Mill, but want to understand what happened here if I can. I am going to compare the files pre and post the SS install and see what I can find...