You need to use "RO High Quality" to get madVR.
Go to Tools>Options>Video and select "RO High Quality", select "VideoClock", and make sure you do not "Bitstream" (under Tools>Options>Audio) as Bitstreaming bypasses the JRiver audio so you will not get VideoClock benefit. Also be sure to turn On "Display Settings Automatic Change Mode" at Tools>Options>Video>Display Settings. Or you can setup madVR to do the Display Changing (in the madVR settings).