Hey Usori As noted in my original post, I have no issues loading the art packs manually. I found the location, and they open just fine.
My concern (and, potentially, my bug report) was that a menu item in the application is not working. I'm hoping that there is a fix, because it leads me to believe that it might be a convenient way to browse the art packs I have installed visually (if it worked), rather than going one-by-one and trying to judge by name which one I need.