Go to http://www.phpmyadmin.net/home_page/ and download the latest stable version.
Backup the config.inc.php file currently on the server.
Use the configuration values from your old config.inc.php file to correctly configure the new config.inc.php
Re-name your existing “PhpMyAdmin” directory something like “PhpMyAdmin.old”
Create a new “PhpMyAdmin” directory.
Upload the new files into the new “PhpMyAdmin” directory
Copy the .htaccess file from the old directory and use it for the new directory
Log into your new phpMyAdmin.