For more information on this topic, please see the Module 4-Advanced Administration Part Two-Web-based Training
It is possible to restore a single vm. When creating the Restore Selection set a tree of all the vm's included in the backup job will be displayed, similar to the Backup Selection. The VMware plugin User's Guide explains the steps to restore a vm.
https://support.quest.com/technical-documents/netvault-backup-plug-in-for-vmware/10.5/user-guide/?article=doc374602&parentproduct=1054
