The File Managers branch under Preferences has the following options:

 

File Manager

This dropdown allows users to select the file manager to be used when the Browse command is invoked for folders added to Projects in the File View.  If the browsers nautilus or dolphin are detected on the host system, these values will be automatically populated in the dropdown.  

 

Command

If using a custom file manager is preferred, users may select the Custom option and specify the command necessary to launch this file manager from a terminal.  If desired, the Browse button may be used to navigate to the location of the desired file manager on the host system so that the full path to the file manager may be referenced.