also update the stand-alone session file
[Desktop Entry]
Encoding=UTF-8
-Name=Openbox/GNOME
+Name=GNOME/Openbox
Comment=Use the Openbox window manager inside of the GNOME desktop environment
Exec=openbox-gnome-session
TryExec=gnome-session
[Desktop Entry]
Encoding=UTF-8
-Name=Openbox/KDE
+Name=KDE/Openbox
Comment=Use the Openbox window manager inside of the K Desktop Environment
Exec=openbox-kde-session
TryExec=startkde
[Desktop Entry]
Encoding=UTF-8
Name=Openbox
-Comment=Use this session to run Openbox as your desktop environment
+Comment=Log in using the Openbox window manager
Exec=openbox
-TryExec=openbox-shell
+TryExec=openbox
Icon=openbox.png
Type=XSession