This Tutorial is a detailed How To aimed for Prestashop beginners, therefore I will not expected, from you, any knowledge at all about Prestasho Admin Interface. Step by Step to Update a Module in Prestashop Version 1.6.* During this Prestashop Tutorial the Url used to reach the Prestashop Back Office will be prestashop-tutorials.dev/v1616/secret-admin-folder and your one should be your-domain.com/your-secret-admin-folder or if your store is not in the root folder then it should be like your-domain.