Upgrade PrestaShop from V1.4 to V1.7 in Upgrading PrestaShop from a previous version Posted April 11 I have a long exiting prestashop which was created 10 years ago. It's version is still 1.4.11. I know it is not a good idea to upgrade it from 1.4 to 1.7 as they are very different. My question is - how can I install a brand new shop 1.7 on the same host and then migrate all data from 1.4 database to 1.7 database? I just wanted to keep all products and sales records. Thank you so much for your help!