You are in firmware (CPU) update mode. Download the tool Eric made for adding DMR and use it to reinstall the 668 firmware or load ws1080 v3.8 firmware to add several things including DMR.
Plug into EZ scan and do the update. You can then fix it with the tool.
EZ Scan does not require you to specify a comm port.
Assuming of course you installed the .inf file previously for the drivers.
Uh Oh it's happening. Whistler is sending out the OTA disable signal, probably over several DMR frequencies. Our "updated" radios are history. Oh well it was nice while it lasted.