1.To delete a drop-down menu, first locate and expand the main menu as explained in Finding a menu in the configuration.
The list of drop-down menus may look like this one (example from FRED4_TABITEMS.XML):
2.Without expanding a drop-down menu, select the entire gray line starting by <l:ShellMenuItem... and then press Delete.
3.Save changes.
4.Re-import the XML file as explained in Re-importing configuration file in the database after making changes.