In removing main menu and sub menu group, the products inside must be deleted first.
After removing all the products inside the submenu, click the sub menu name on the right and click the Delete button below or right click the sub menu group then click the Delete Sub Menu (D)
A message box will show, just click OK to complete the process.
Click the main menu name on the right and click the Delete button below or right click the main menu group then click the Delete Main Menu (D)
A message box will show, just click OK to complete the process.