You can upgrade Plesk in either of the following ways:
To update or upgrade your Plesk software from the control panel:
The control panel connects to the Plesk Update server, retrieves information on the available releases, then analyses the components installed in your system, and displays the lists of available releases and component updates. For each Plesk version released a brief description of available operations is displayed.
Note: If you want to update/upgrade from a locally stored Plesk distribution or Plesk update server mirror inside your network, click Preferences, select the "Network storage" source type, specify the URL and click OK.
To update or upgrade your Plesk software by means of the Auto-installer utility:
/usr/local/psa/admin/bin/ on RPM-based Linux and FreeBSD systems, and /opt/psa/admin/bin/ on deb-based Linux systems.You can choose to upgrade from a local medium, the official Plesk update server, or another site. By default, the official Plesk update server is selected. If you wish to retrieve installation files from a local medium or network storage:
By default, all packages are selected, including Plesk modules. The selected packages are marked with [*] symbols. The packages that are already installed and do not require updating are marked with [=] symbols. To select or deselect a package, type the respective number and press ENTER.