Mach3 + ShuttleXpress = odd jog + no keyboard

[MacMarty]

I'm running a CNCrouterparts router, with Mach3+ESS -and- ShuttleExpress jog dial. Windows 10.

All was well for several months, until today, when I have this combination of oddities:
- No movement response to usual keyboard keys: RightArrow, LeftArrow, UpArrow, PageUp, PageDn
- ShuttleXpress axis-buttons and outer ring work fine, but inner (step-move) circle produces an unwelcome (and large, like .25") movement.

Very strange, and cost me a carbide end mill. (sad.) Has anyone else experienced this? Should I be asking somewhere else?

Thx for any guidance.

[machinejack]

Go back and reload an older XML file from before the trouble started seems to work for me. Glitches happen and when all else fails you can always reinstall everything.
Jack