Musesound/Musehub Problems

Greetings,
I am having problems with some Musesound packs. Especially Keys, Brass, and Master. When I update them, it keeps loading indefinitely without changing anything, and I cannot pause it. The only way to stop it is to restart musehub. I tried to delete these three things, but it doesn't work, it doesn't want to delete itself. When I try to empty the cache, it says it's impossible.
Is there any way to fix this?