Powershell Script for Updating ZVR?

I don’t have much experience with the cmdlets.  I mostly use the API directly.  I’m not aware of any methods within the API that would allow you to update.  However, there is an upgrade manager that allows you to upgrade all your protected sites with just a few clicks.  We are a service provider, so I don’t know if that makes much of a difference for enterprise users and/or if it’s available.  You can find it at cloudcontrol.zerto.com