I have been using Mach3 with Windows XP on a CNC router for years with no problems. Now, however, I can load g-code from the Mach3 supplied profile "Mach3Mill" but I can no longer load g-code from my profile that is configured to the machine.
When I try to load saved g-code files all I see in the g-code window is "Rhinoceros Binary STL (Feb 3 2021)" in the white bar.
If I try load a file to the computer from a flash drive I get the error message " Cannot move [file name]: The source and destination file names are the same. Can anyone help? Thanks!

Solved! Cloned default mill profile and changed setting to match profile that wasn't loading g-code.