Whenever there's a "file" or "folder" edit box in the user interface, Database Workbench shows a small folder icon and an ellipsis icon to the far right in the box.
A File and a Folder edit box
As you can see in the above example, the Folder box doesn't display its text properly. Because file specifications and folders can be very long, longer than the edit box, you often cannot see the full file path or folder path. The box will show you a few dots ( ... ) and the first part and last part. If you go into the box with the cursor to edit the path, it will become fully visible so you can edit it. If the path fits, it will simply show the full path.