Container applications are managed and billed by package sets. A package set includes all versions of a particular application (i.e., the set of application templates). This means that if an application is included in a hosting plan, then absolutely all versions of this application a HSP can offer are available for customer who subscribes for a hosting plan, without the need for a customer to pay any additional fee for a new version of an application since all versions are included in the setup and recurring fee set for an application package set. So, after an application package set is purchased, all further actions within a package set (upgrades or downgrades) are not billed. Customers can also downgrade applications to earlier versions, and this does not result in any special chargebacks or fees.
When a new version of one or another application appears, this is registered as an Parallels Business Automation - Standard system event tracked by the Event Manager. If an e-mail notification action is attached to this event, an e-mail notification is automatically sent to all customers subscribed for the corresponding package set. Customers can select whether to install a new version or not.
Note: You can allow customers to disable or enable e-mail notifications for particular events. If notifications management is allowed for some event, a customer can see the Notification Settings icon in the My Account zone of the Control Panel. A customer can click on this icon, get the list of events allowed and check or clear box(es) next to event names to receive e-mail notifications for an event or not. To allow a customer to subscribe or unsubscribe for e-mail notifications on a particular events, go to the Configuration Director - Event Manager - Events, select an event, on an event settings menu click the General Settings tab and check the Customer can control receiving notification for this event box. You can also edit the set of events a customer receives notifications on per account basis.