I've found this great article on how to change user / admin / employee password via phpmyadmin if you can't login to your dashboard in Prestashop. It works both for 1.5 and 1.6 version.
The short overview:
1. Open ps_employee data row in your database
2. Click Edit near user you want to change, find "Password"
3. Choose MD5 in "Function" column.
4. From your settings.inc.php file (config folder in prestashop folder) copy COOKIE_KEY value (usually, line 10) to "Value" column. At the end of it add new password (with no spaces!).
If you need more detailed instructions with images, click link above:)
The short overview:
1. Open ps_employee data row in your database
2. Click Edit near user you want to change, find "Password"
3. Choose MD5 in "Function" column.
4. From your settings.inc.php file (config folder in prestashop folder) copy COOKIE_KEY value (usually, line 10) to "Value" column. At the end of it add new password (with no spaces!).
If you need more detailed instructions with images, click link above:)
