To update Projectfork, you first have to find out which version you have currently installed. You can skip this step if you already know which version you are using. Otherwise, navigate to: Joomla Backend -> Extensions -> Install/Uninstall -> Components

Once you know your current version, download the corresponding update package for that version from the Projectfork download page. After that, upload the content of the package to your joomla root directory and replace any existing files. That's it. If you're having trouble updating, visit the Installation & Upgrading forum.