Could you be more specific about your PP install? It works on mine. I did notice that it will have to be the only choice. You can’t select it from the list. When I installed mine, it made it the only post processor I could use. If you have a laundry list of PP’s then that’s your problem.
As for the G code. I don’t know enough about it but I believe that when I install my SD card into the LCD, I can manipulate the code there - I think. I don’t mess with it because things work fine. I did notice that I had to change the X, Y, and Z axis around when using this Test 5 PP so they move in the correct direction.
My Aspire was a gift and the kids forgot what email they used so I have never been able to download the extra files for carving. That sucks because that was the reason I wanted the software! They bought it last year and never wrote down the info or kept the email so Aspire told me “too bad, I have to buy another copy. Geez, the software was expensive the first time!”. Still, my software works.