Hi,
HikaShop do use the alias of the menu item.
If you see "hikashop-menu-for-products-listing" in your URLs even though you've renamed that menu item alias, it means that either you have a SEF extension like sh404SEF with some cache of the SEFed URLs and the cache should be cleared, or you've entered these URLs with "hikashop-menu-for-products-listing" in the "canonical URL" setting of your products and you have turned on the "force canonical URLs on listings" setting in the HikaShop configuration.