To restore files, first you need to log into your Hosting Control Panel (DirectAdmin).
Once logged in, click the JetBackup icon in the Extra Features section.
Click on either Full Backups, Home Directory or Databases, depending what you need restored:
Select a date you would like to restore from and then click Restore:
The window the pops up will have all items selected by default and you can choose to remove certain items from the list of what will be restored, then you can click Restore Selected Items to begin the process: