Added correction to my above post- you don't need short-code in created "File Browser" page, when you pickup this page in plugin's settings>>File Browser>>ID post - you page" all dir's will shown at this page without short-code. Sorry - my mistake!
Please see also about search and File Browser here
To use the search feature and category linking, it is necessary to set a File Browser Post or Page (see FileBrowser): Create an empty Post or Page with a title like “Downloads”, then go to WP-Filebase -> Settings, click on the tab “File Browser” and select the created Post/Page. The File Browser will appear on the selected Page where users can browse through categories. This page is also displayed in search results if there are matching files.