I uninstalled it from Windows Device Manager.
When I wanted to get it back, I looked in Options/General/Features, and the WMD was missing. The ASIO was checked, but I don't see it anywhere in Options/Audio/Audio Device (it used to be there before I unintalled the JRiver audio drivers from Device Manager). I also don't see it in the Windows Playback Devices options anymore (it also used to be there before I uninstalled it).
After I installed the lastest version for V20, the checkbox for WMD is back, and I checked it and rebooted Media Center, but I still do not see it in the list of audio drivers in the Audio Device tab in Options/Audio.
What I'm trying to do, is to use the JRiver audio drivers so I can use the VST DSP plugins I installed in Media Center's DSP Studio even when watching online videos or listening to online streaming using the web browser, or when using some other media player.
EDIT: Okay, now the JRiver audio driver shows up in Windows Playback Devices options, but there's no sound when I try to play anything. Is there something else I'm supposed to do? And I still don't see them in the Audio Device tab in Options/Audio