Upgrade to 3.4.1

Hi all,

I would like to demo internally the latest version of RT on Windows
2003.
So far I have installed the Windows version using the windows installer,
but this is 3.0.12. I tried to upgrade it to 3.4.1, but I am stuck with
the databaseupgrade. Is there an upgrade script available, or any
workaround?
Your help is greatly appreciated.