New HDK2 doesn't show as COM device in Devince Manager

Just got my HDK2 in today, and I'm trying to set it up. I have followed this guide but downloaded current software from github. However, running OSVR Control gives me an error about the HDK not going into programming mode, and in Device Manager it appears under Other Devices as DFU ATXMEGA256A3BU. Any advice on how to proceed?