database conversion from premium to pro???

I had a staff member install the wrong version of simply accounting (Simply Accounting 2011 Premium).
Our paid version is Simply Accounting 2011 Pro.
This company was opened one time in the premium version and it converted the database.
Now we cannot open our company in our paid version of 2011 pro.
Anyway this can be converted back for us?
We have not used the company since it was accidentally opened in premium edition.

Thanks