Recently a friend installed a new harddrive in my cnc computer and I have now trying to use it. Motor tuning does not appear. I have done a "motor tuning" search and it seems one possible problem is that he renamed the file. I deleted Mach3 mill and reinstalled it and renamed to what I think was the name it was using before the new hardware but still no motor tuning. What shall I do now? Is there a workaround for this? Thanks, Pico