Go to Subscriptions > example.com > Backup Manager and click on a required backup from the list. The backups of the subscription created during full server backup will be displayed here as well:
Select Type of objects to restore: Sites and click on a domain (or several domains) that needs to be restored. Click Restore.
Alternatively, select Type of object to restore: Files of domains option and select the ‘httpdocs’ folder to restore domain’s content. Also it is possible to restore only specific files by selecting them.