You may need to grant permission in "Security & Privacy" settings for the driver to load.
Port Priority: Ensure nothing is interfering with the physical connection. If the router doesn't "see" the USB connection, it may default back to the RJ-45 port. asr9xxusbconsoledriverszip
To download the official, safe version, you should always go to the Cisco Software Central website: Navigate to the Cisco Support & Downloads page. Search for "USB Console Software." You may need to grant permission in "Security