On the the Update Product Components page, choose to Cancel updating, as you need to upgrade the product itself (Plesk).
List of components for which updates are available
Click OK to confirm that you want to cancel any updates.
On the Summary page, choose to Install or Upgrade Product.
Summary of available options for updating/upgrading
Check the box next to Parallels Plesk Panel to select it for an upgrade. By default, the newest version will be selected, but you may choose another option.
Click Continue to proceed with the upgrade.
Products available for installation
The upgrade will begin and a log and progress bar will show you the current actions being taken. Typically, an upgrade of Plesk takes less than 15 minutes.
You may be logged out of Plesk due to inactivity while the upgrade is running and the upgrade may appear to have stopped. In this case, close the window and follow steps 1-3 to return to the update page.
Status of update
You will receive a message when the upgrade has successfully completed. Click OK to continue.
Notification of successful upgrade
Plesk has been updated to the version you selected. You can now Update Components or Add Components.
Summary of available options for updating/adding
For additional information, you may want to reference: