GrahamJB

Good idea, I hadn't thought of that, I might use a batch file to copy a settings.ini file in, before starting the program, and prompt to copy it back when...

That is also a possibility, but I'm on Windows 10 so I think I would have to run as an administrator. I can't upgrade to Windows 11 as my PC...

The 'C' cable uses USB style connectors but is not a USB cable, definitely custom.