OK here’s what worked for me; on Windows 7 Ultimate:
- initial plug-in installed driver “HP Printer (BIDI)” – meaning “bidirectional” maybe I assume
- Device Manager / Update Driver / Browse (to my C:…\Joulescope folder) / did not change
- Device Manager / Uninstall / unplug / replug / just got same driver again
- Device Manager / Uninstall with Delete the driver / unplug / replug / started “Searching Windows Update”
- I interrupted (STOPPED) the WindowsUpdate step, and now suddenly I have “WinUSB Device” and readings appearing.