title: Clicking VS2013 Extensions and Updates Manager causes exception
body: <p>I have just installed Visual Studio 2013 and have run into a problem with the Extensions and Updates Manager. When ever I click it I get a "object reference not set to an instance of an object"
  See <a href="http://screencast.com/t/LKK0TWcz" rel="nofollow">http://screencast.com/t/LKK0TWcz</a></p>
  
  <p>I've re-installed VS2013 twice...to no avail. Any ideas>></p>