Joomla Administrator: How to reset the Joomla Administrator password. www.BuildAJoomlaWebsite.com – this tutorial demonstrates what to do if you lose access to the Joomla Administrator. You can’t actually reset the password as such, but you can easily change it using a tool that is often provided by web hosts called phpMyAdmin. This is a fairly easy process, however it does require you to make a change directly in the database. If you are uncomfortable doing this, you might like to ask your web host if they can do it for you.