I had a look but could not find where to reverse axis. I have installed the current version of mach3 also and now files have some added/unwanted circles? I did not draw these circle and it as if they are added to all my saved files. Is this becuase of the newer version of mach3.
I have got about 50 to a 100 saved coral files that i used cut2d to make my Gcodes. This all worked fine until i changed over from xylotex to G540 and updated to the current mach3 version.