I was able to load the updated file and it fixed the engine sounds problems. Thank you! I even replaced one of the engine sounds with a 24 bit station stop sound clip. Unfortunately, I replaced one that I need, so I will need to edit the file again to put that one back and change out another.
In the process, I also reconfigured an old PC that I can use as a dedicated loader, unless I get my Windows 10 PC working well with a USB serial port adapter.
George