locate .desktopand find where they are scattered around your system. The name is usually descriptive enough. Delete the .desktop file to remove the menu item or edit it to change description.
Computer Tips - Gnome: How can I edit my menus?
Date: 2009nov20 OS: Linux Q. Gnome: How can I edit my menus? A. There is a graphical menu editor but I find the easiest way is to edit the files directly. Each menu item is defined by a file with extension .desktop so you can do: