title: Visual Studio 2013 can't remove assembly reference
body: <p>I got a new machine and upgraded from VS2012 to VS2013. Now i'm trying to compile a Project with DevExpress. Unfortunately the Compiler cant find the references and i'm not able to remove them from the Project Explorer. I installed the same DevExpress package.</p>
  
  <p><img src="https://i.stack.imgur.com/pbJsy.png" alt="no Options to remove assembly from list"></p>