title: Does Flash Builder 4 now use AIR 2?
body: <p>I just got CS5 master suite which includes Flash Builder 4 and Flash CS5 Pro.</p>
  
  <p>When I create a new AIR app in CS5 pro it says "AIR 2" but when I create a new AIR project in Flash Builder I do not see anything indicating that it is AIR 2 or 1.5? </p>
  
  <p>Is there a way to tell which AIR runtime it is using?</p>