title: How do I exercise my Visual Studio 2013 downgrade rights?
body: <p>I have a copy of Visual Studio 2013, and while I mostly use it, I have to work with one particular C++ SDK that does not yet officially support Visual Studio 2013, so I'm looking to install Visual Studio 2012 using my Visual Studio downgrade rights.</p>
  
  <p>According to the Microsoft Licensing Information, this should be possible:</p>
  
  <blockquote>
    <p>For Visual Studio Professional, the software included in the license is the current version of the software, Visual Studio Professional 2013, <strong>plus downgrade rights to simultaneously run prior versions of Visual Studio Professional to which you may otherwise have access.</strong></p>
  </blockquote>
  
  <p>(emphasis mine)</p>
  
  <p>I have access to a copy of Visual Studio 2012, however I'm still being asked for a license key (which I guess is to be expected). How can I license my copy of Visual Studio 2012 using my Visual Studio 2013 license (if at all)?</p>