Hi,
I suppose that you're talking about the orders menu in the backend right ?
Are you talking about the menu item in the main menu of the Joomla backend, which is a submenu of the HikaShop menu item ?
Or the menu item of the menu bar of HikaShop next to the System, Customers, Products, Documentation menu items ?
Could you maybe do a screenshot ?
Also, if it's the Joomla menu, it's probably an issue with the menu item data in Joomla. In that case, you can try the "rebuild" button of the Joomla menu manager. That oftn helps in those cases.