Muse Sounds not working

I downloaded MuseHub. I signed into MuseHub. I downloaded Muse Drumline. I downloaded MuseScore 4. I signed into MuseScore 4. I opened a new score. I added snare, quad, bass, cymbals. I tried writing with it. I noticed it sounded bad. I opened the mixer. I saw that my instruments were using "MS Basic" and not "Muse Drumline". There is no option to switch to Muse Drumline. I don't know what to do. How do I make the Muse Drumline sounds work?