Musescore cannot find Musesounds in a custom path
I installed Muse Hub for Linux as described in the announcement of beta release and downloaded Musescore Appimage from there. However the default path that Muse Hub uses to download would fill up a limited partition at my disk. I chose a custom path to install Muse Sounds. Everything was downloaded correctly, but when I run Musescore it simply doesn't recognize Muse Sounds. The only soundfont available in the mixer is MS Basic. What do I do to make MS4 recognize Muse Sounds where they are installed?