Last week, Windows Live Services software was released and upgraded. If you had betas installed, or just earlier versions of the products, you can upgrade them to the latest and greatest in a few simple clicks. Check out the Windows Live Services page here for the link:
Windows Live Services
When you run the installer against the earlier versions of the products, it will look something like this:
This is the easiest way to get updated versions of Live Writer, Mail, Messenger and Photo Gallery.