Ya, Ya! --another Newbie!
I am running the demo version of Mach 2 ---are the Wizards enabled? If I try to set drill size, home position etc, it will revert back to original configuration on next change I do.
So far Mach 2 seems to work fine for what I need it for, I have tried Mach 3 but had configuration problems, so reinstalled Mach2
Thanks