Upgrade my Prestashop..to the new 1.6

Hello, Thanks for the question! It's really easy actually. The first you should do is update your module called 1-click Upgrade. Simply go into the PrestaShop administrator, go to Modules, then click on the UPDATE option. After it's finished, click on 1-click-upgrade option and follow the instructions it gives you. Make SURE that you have created a backup BEFORE you run the upgrade. This will give you recovery insurance just in case something goes wrong. Once you've finished the upgrade, test your store! I hope this helps to provide you the information you require! Please let us know if you require any further assistance. Regards, Arnel C.