I am running into an issue with my Presta shop. When PHP is upgraded, it breaks the website. I have been told that the website and back end servers haven't been touched since 2015 except to add/modify products. It's currently our archive website where the sales team looks up previous orders. Can I use the 1-click upgrade module to update to the latest version of Presta Shop?
As a note, I have no experience with Presta Shop, but I do with servers and web development, but the website has been backed up.
Thank you for your time.