Download the OVF and deploy it via VMware vSphere.
Upgrade the appliance through vCenter by using the VMware Update Manager Plug-in
Or by the management interface on HTTPS port 5480. Consult with the User Guide for more information.
There is no automated and direct upgrade process from versions prior to 5.3 to version 5.3 or above, because of operating system and other infrastructure related updates. In order to upgrade existing deployments prior to version 5.3 to the latest version, please refer to the release notes.