How do I add my custom Adobe Substance .sbsar Material Library to User Library?

Hello,
How do I add my .sbsar library to the user library? I imagine if I can download substance materials directly into the program then I should be able to do this with my custom .sbsar library.
Steps taken:

  1. In preferences I set the path to my .sbsar library of many folders, and it is not populating is the user library. Do I need to import these .sbsar material individually?
    Please advise and I hope that I can do this, since this is easily done in other rendering programs.
    Thanks!