QuickBooksForum.com.au

Over the weekend I had to reformat my c drive so I naturally went into Quickbooks and made a backup file of my current company file to both a spare hard drive and also to a flashdrive. Once I had windows 7 setup again I reinstalled Quickbooks 2011/2012, activated then reinstalled the 2011/12 tax tables. I then attempted to open my backup file but get a message

"Quickbooks cannot openm this data file becuase it was create din a different edition. You can only only open quickbooks accounting files within this ediiton."

Any advice on what can be wrong here as Im starting to sweat thinking I may have lost my latest file.

Thanks
MikeN