title: Design view disabled in Blend + Sketchflow 2012
body: <p>I have a project that was created in Blend + Sketchflow preview for Visual Studio 2012.
  It is a simple project as I am learning C# and WPF for the first time. I have two windows. A simple start screen with a button that shows the other screen. The other screen has 4 buttons which change colors during a random order animation sequence.</p>
  
  <p>My problem is that the design view became disabled. I can not open any XAML in design view anymore or edit any Storyboards etc. The only thing different I could think of is that I added a class file in Visual Studio 2012. After the project refreshed the design view went away and all I can see is the xml version of it.</p>
  
  <p>If anyone can show me the solution I would appreciate it as I have searched google and stackoverflow and no answers have been found. I am new to both the language and VS/Blend so this may be a simple fix, I have no idea. Thanks in advance!</p>