To do this log into the Client Area then:
Step One: Click on the “Cloud Control” drop-down and select “Cloud Portal”
Step Two: From the next page click on the Cloud Server, you are wanting to upgrade which will open a new window with management options for the server.
Step Three: On that new page, under the Overview tab and the listing for “Product”, there will be a button for upgrading the Unmanaged server as depicted below
Step Four: This will then create an Invoice that will be due same day, once it is paid the upgrade will be completed.