MuseSounds Pipe Organ

I just purchased the MuseSounds Pipe Organ. I was excited to be able to have a decent pipe organ with several presets available for playback and demos of my compositions. However, within MuseScore, when I go to that sound library from the mixer, I only get the options of "Manual" or "Pedal".
Do I need to be in a DAW to access all the features? I currently compose / create my works within MuseScore from the computer keyboard.)