Great for when you would like to hide an admin menu from a user so that they will not accidentally click the menu item.
Manually type in your plugin directory, such as "http://yoursite.com/wp-admin/plugins.php" and deactivate plugin. Then it will clear all users that have been added.
You must find the css id for that menu. A great tool to use to find it would be firebug (getfirebug.com) to find the css id. It will look something like "li id="toplevel_page_plugin"