When restoring a full backup it overwrites ALL your hosting account information to the one you had when you made the backup. Including mails, MySQL databases, files, etc.
I've moved your backup to your root directory, never put it on your public_html as people will be able to download it, and could stole your pages/information.
That's the content of the backup you uploaded.
The only thing that could have made the backup incomplete is if the backup was cut when it was being created. I've downloaded the backup to my CPU and when opening it WinRar gives me an error telling me "The archive is corrupt - Unexpected end of archive".
So I'm almost sure that this is the problem, the backup generation didn't complete (I saw the backup was from another host, so you could ask them about it).