I have only general midi sounds in my Halion Sonic SE library

See screenshot.

I recently found that my sounds were not playing from tracks anymore and noticed that somehow all of the sounds I was using from Sonic SE had disappeared for no known reason. I have tried reinstalling and cleaning everything up several times, but I just can’t get the sounds back. Only GM sounds remain and they’re not of a good quality like the ones I was using.

I have used the library/plugin manager, but that didn’t help. I have made sure that Halion Sonic SE and its .dll file is in the right directory. I have also made sure I’m not filtering only GM sounds. Is there any way to fix this? I have tried everything in my knowledge…