I attempted importing a Soundpool I got in MMJ (Electrified Guitars) and while importing was "successful", about half of the sounds from it don't show up. I tried clearing the list of Soundpools and adding them again, putting all Soundpools in a Basics_19 folder and adding them like that, and still nothing changed. I never had problems like this before.

If it helps any, I'm using MMM free, version 25.0.2.44 on Win10.