Muse Sounds seem to have become unavailable

Today I opened up MuseScore and I was a little surprised when the playback seemed… kinda just bad. It had switched for some reason from Muse Sounds to the more generic MuseScore Basic.
I really want MuseScore to use Muse Sounds, because they just sound so freaking good! So, to troubleshoot this new issue, I went to View > Playback setup. It claimed that Muse Sounds was still active, even though what the program was playing back was distinctly midi.
I then tried to switch to MuseScore Basic and back, because something similar in the past happened and that solved the problem. However, upon switching to MuseScore Basic, the Muse Sounds option became grayed out and I wasn’t able to select it to reactivate Muse Sounds (screenshot below).
Why might this be? Is there something going on behind the scenes that for some reason makes Muse Sounds unavailable? I hope whatever is going on that I can get this figured out; I already miss the almost real quality that came with MuseScore 4.