Thanks DarkElf109 !
I have followed the instructions in the Ubuntuguide.
First I installed the Smeg Menu Editor using using the sudo apt-get install smeg
command in the Console
Then I refreshed the GNOME panel with killall gnome-panel
The Ubuntuguide says now Smeg Menu Editor can be started in the menu: Applications -> System Tools -> Smeg Menu Editor
. But there is no Smeg Menu Editor in my menu. I can se an application named Applications Menu Editor but no Smeg Menu Editor.
Why doesn't Smeg Menu Editor turn up in the menu after installation?