I just re-installed my Mach3 system. All working fine, however when I cycle Mach3 it sets the X, Y and Z axes to zero, requiring recalibration.

In its previous incarnation the Z axis setting was sticky - whatever it was set to prior to Mach3 being cycled would survive.

Clearly I've not set something to allow Mach3 to "remember" the Z axis value. Problem is, what?