The MProg is available here: ftdichip.com/Support/Utilities/MProg3.5.zip
In the MProg.exe select first Tools -> Read and Parse and then File -> Save As.
In the saved file there should be found this section:[BM Device Specific Options]
USB Version Number=1
[quote]Still can’t fathom why the software would stop working when there may be issues with the device.[/quote]I’m not sure what there happens. Maybe the USB communication fails and software keeps waiting for data.