Best idea is to copy the wizard just in case you make a mistake.
You will find it in C:\Mach3\TurnAddons\Turning If you just copy that whole folder then you will be able to place it back if something goes wrong.
Ok to edit the wizard you open the wizard from Mach then if you go to operator menu then Edit Button Scripts the Post Code button will be flashing, click it and the editor will open and you will see the code. Look for G94 and change to G95 and save and close, you should now get G95 when you post code from that wizard.
Hood