Installing Full Text Search to SQL Server 2008 R2

I installed sql server 2008 R2 Express successfully, then realised I need to get Full Text Search. So I downloaded the "Advanced Services Installation Package", but when I run it there is no option in the "Feature Selection" part for Full Text Search. Please don't tell me I hav to uninstall and reinstall?

Its a two step process.

• In the installer select Maintenance/Edition Upgrade to upgrade your existing instance.

• Run the installer again and select Installation/...or add features to an existing installation/Add features to an existing instance.

StackExchange Database Administrators Q#46273, answer score: 6