Supprimer « Utilisation Non commerciale » dans la barre de titre de Outlook

QUESTION: - How to easily & quickly remove the 'non
commercial use' in the title bar for a newly installed version of office
professional 2007?

BACKGROUND
I am running Windows 7 and have the Office
Professional 2007 on dvd.
My new laptop was pre-installed with office 2007.
I did not un-install this, I just put in my new office
2007 professional dvd and completed the installation.
Everything works, however, outlook (only outlook)
displays the 'non-commercial use' in the title bar. I
have no entry for office 2007 in the add/remove
programs. The only entry is for my new office professional 2007. So I
cannot now uninstall the 'trial version' that came with the laptop.

ANSWER ?
I could backup my pst file and uninstall office and
clean out all registry entries. Then re-install office professional 2007,
put back my pst file and add in my 10 different email accounts again. But
honestly, this would be a pain. So is there an easier way to do this or at
least a way to backup the settings of my outlook email accounts (export)?

Thanks
Patrick