How to restore mails from deleted folder in Yahoo mail?

Zimbra 7.2.1, Windows 7 Ultimate 32

1. I have backup of Yahoo mail account one month old which I can't restore (5 GB tgz archive!?)
2. I have saved recovered data from folder c:\users\<User>\AppData\Local\Zimbra\Zimbra Desktop immidiatlly after deleting

Thanks for any help.