Hi Julie,
You need to go to C:\Program Files\QPRollVxx\Data and delete the file called qcompany.tps.
Then when you reopen payroll premier it will ask you to select which file to open.
You can try opening your file again, but it is unlikely to work.
You will need to restore an old backup.
So you can follow this link:
http://kb.reckon.com.au//issue_view.asp?ID=2264
You can also try this:
http://kb.reckon.com.au//issue_view.asp?ID=4212
Kind regards,
Sally McIntosh
sally@samsolutions.com.au