1. Using Back Office (Admin Panel)
Enter Back Office: Login to your PrestaShop admin panel.
Open the Module Menu:
Select "Modules and Services" or "Modules" (depending on your PrestaShop version).
Upload a Module:
Click the "Upload a Module" button at the top of the page.
Select the .zip...
Here is a guide on how to restore/reset the Prestashop admin password:
Step Access Your Hosting Panel
Log in to cPanel or other hosting panel you use.
Find and open phpMyAdmin to manage your database.
edit database employee.
klik passwd to fungsi MD5.
klik save.