How To Restore Automatic Upgrade Backup

I give up. Open source has its down falls, unfortunately 2.6 is falling hard. I just want my old site back. I used Automatic Upgrade Plugin which gave me two zip files. How do I now restore my old site using this??

Please any help would be great. I know nothing of Sql, databases, etc. Just a simple gal who used Bluehost one click install and never looked back ??