Apologies for not being clearer, Jon.
There’s no error other than the “Python has stopped working” dialog when opening via GUI.
When running the troubleshooting command line, I get the same as before (without the line starting "This application has requested…), but the userPrefs/audioLib workaround still doesn’t work here.
Please let me know if you have any other ideas and/or if there’s any other info I can provide to help.