The part library manager gives you options to edit your list of part libraries:

With some options to copy/delete/add new parts you can manage your libraries here and manage the available libraries in the settings dialog:

The library types containing data from the open Job/Design, local types like xml or lite DB and online types like API Part Libraries, REST Libraries and out 365 Libraries:

With the context menu you have options to copy or edit the part, you can export the library list and search for specific information:

Here is an short video how to bring parts in your library: