Object reference not set to an instance of an object. VSPro 11 when executed

Object reference not set to an instance of an object.

System.NullReferenceException

  at Reflector.Application.DesktopApplicationManager..ctor(IWindowManager windowManager, IUsageHelper usageHelper)

  at Reflector.ApplicationManager.CreateInstance(IWindowManager windowManager, Boolean hosted, IUsageHelper usageHelper)

  at Reflector.ApplicationManager..ctor(IWindowManager windowManager, Boolean embedded, IUsageHelper usageHelper)

  at Reflector.ApplicationManager.Main()