F4 doesn't work for me also. I recieved the following traceback in a shell:
Traceback (most recent call last):
File "/usr/lib/scribes/GenericPlugins/SidePaneFileBrowser/Trigger.py", line 40, in __activate
idle_add(self.__get_manager().activate)
File "/usr/lib/scribes/GenericPlugins/SidePaneFileBrowser/Trigger.py", line 35, in __get_manager
self.__manager = Manager(self.__editor)
File "/usr/lib/scribes/GenericPlugins/SidePaneFileBrowser/Manager.py", line 8, in __init__
self.__gui = editor.get_gui_object(globals(), join("GUI", "GUI.ui"))
File "/usr/lib/pymodules/python2.6/SCRIBES/Editor.py", line 600, in get_gui_object
return get_gui_object(globals_, basepath)
File "/usr/lib/pymodules/python2.6/SCRIBES/Utils.py", line 489, in get_gui_object
gui.add_from_file(file_)
glib.GError: /usr/lib/scribes/GenericPlugins/SidePaneFileBrowser/GUI/GUI.ui: required gtk+ version 2.24, current version is 2.22
Does Unity use F4 for another function? Do you get any errors in a shell terminal?