You can update your security virtual appliance to another version, which can be a later version, older version, or the same version. Ensure that the OVA file of the version that you want to update to is stored in your local drive.
To update the security virtual appliance OVA
In the Management Console, click the Assets tab.
On the Assets page, click the Malware Protection tab.
In the NSX Service Registration panel, click Browse to navigate to the location where the OVA file is stored.
In the Select file dialog, select the file, and click Update OVA File.
Click Yes in the Confirm Operation dialog to proceed with the update.