The File Tree View branch under Configuration - Application Layout has the following options:
Show volume labels in Explorer view
If this option is selected, volume labels rather than just drive letters will be displayed under the Explorer tab in the File Tree View.
Network drive label format
If the option above is selected, the format defined in this field will determine how the volume label is displayed under the Explorer tab in the File Tree View.
Show registered file type icons in Explorer view
If this option is selected, system registered icons will be used under the Explorer tab in the File Tree View rather than generic file type icons.
Scan for empty folders in Explorer view
If this option is selected, the editor will detect empty folders in the Explorer view in the File Tree View. Those folders determined to be empty will NOT have a "+" shown beside them (indicating that they may be expanded). If this option is not selected, the "+" may or may not be accurate, but will not be updated until the editor attempts to update/expand the selected folder.
Cache volume info in Explorer view
When the mouse hovers over a drive in the Explorer view, the editor attempts to get the latest information about that drive and display it. If this option is selected, drive information is cached and the drive is not accessed so often.
Activate file in Open file list on single click
If this option is selected, a single click in the Open file list in the File Tree View will cause the referenced file to become the active file in the editor. By default this option is not selected and a double click is required.
Resolve Link files and directories in Explorer view when opened
If this option is selected, linked files will be opened when the lnk file is clicked on in the Explorer view, and the Explorer view will navigate to the linked directory when the lnk directory is clicked on in Explorer.
Show Network browser in Explorer view
If this option is selected, a Network node is displayed in the display tree in the Explorer pane of the File Tree View. When this node is expanded, a listing of the members of the network to which the system is currently connected is displayed. Users may navigate this tree and access remote servers without mapping drives. Paths for files opened via this method will be accessed/referenced using Universal Naming Convention (UNC) format.