There is one more way that you can do this:
When you select restore action you can check the checkbox Add/override params and add VIBE_VCLOUD_NAMES parameter to the grid with a value like org1::vApp1.
i.e VIBE_VCLOUD_NAMES=org1::vApp1
Please let me know if you have any questions, the above way you restore 1 vApp without modifying your backup config which is used for your org.backup.
Kapil
Message was edited by: Kapil Arora