title: Visual Studio Version Selector Doesn't open
body: <p>I have Visual Studio 2008 and 2010 installed side by side, but trying to open either a 2008 or 2010 sln file results in nothing. The hour glass comes on for about a second and then it goes away and nothing is opened.</p>
  
  <p>I read somewhere to relate sln file to VS directly, but I can't go that route because I don't want 2008 solutions to open with 2010. Does anyone know what the problem might be and how to fix it?</p>