Go to Filr -> Libraries. You should see a screen like this:
You can create libraries by adding a name and click “Add new library”. That’s it! On the right side of the screen, you see your available libraries, the number of files you assigned to a library, and a shortcode that you can copy.
Now you can add the shortcode to a page:
Based on your settings and the configuration of the options the result should look like this: