Edit window name

How do I edit the name of the opened browser window?  When I open DT, the browser window is labeled “     /     “.  When I go to the menu bar, there is a checkmark in front of this named file.  Can I have several files in DT with different names and data?  I would like to give this file/browser/window a different name. ???

Browsers display the name of their top level group in the window title (e.g. double click on a group to open a new browser and the title of this browser should be identical to the name of the group). However, if the group is the root/home of the database, then "/" is displayed. To change this, use "Properties…" (see Tools > Properties… > Name).