Welcome!
I am not familiar with version numbers, but are you running the new beta, or the stable version?
If you don't know, it means you are running the stable version.
I suggest removing Messenger and reinstalling it. Go to Control Panel>Programs and Features, and uninstall Windows Live Essentials. As soon as you start, it will ask you which components to remove. Go ahead and remove Messenger by itself.
You can then reinstall Messenger the same way. Go to uninstall it, and this time install Messenger.
Hopefully, that will do the trick.
~JK