Hadn't done that before. Was using the zadig driver install/update method. I uninstalled the device and deleted associated driver then used your link to install the 64bit version of the SL driver. Device now shows up on COM5. Is that where it's supposed to be instead of USB?
When I tell MM to scan for new hardware it shows up along with my GPU (again for some reason). Will try to start mining here shortly and let you know.
Thanks!