title: iPhone Simulator 3.x not listed after upgrading to XCode 3.2.3 Beta4 with OS 4.0
body: <p>When I last installed Xcode 3.2.3 Beta 2 (OS 4.0 support), it had all the iPhone Device &amp; Simulator 3.x.</p>
  
  <p>Now, updated to Xcode 3.2.3 Beta 4 (OS 4.0 support), it no longer lists 3.x SDKs for either simulator or device in XCode. When I run an app that was written for 3.1.2, the current SDK is listed as "base SDK missing"</p>
  
  <p>I'm aware that 3.2.3 changes the BASE SDK to 4.0, but how come none of the 3.x devices are available either?</p>
  
  <p>When I go to:</p>
  
  <pre><code>/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs
  </code></pre>
  
  <p>The only two files available are:</p>
  
  <pre><code>iPhoneSimulator3.2.sdk
  iPhoneSimulator4.0.sdk
  </code></pre>
  
  <p>However, when I go to:</p>
  
  <pre><code>/Developer/Platforms/iPhoneOS.platform/DeviceSupport
  
  3.0
  3.0.1
  3.1
  3.1.1
  3.1.2
  3.1.3
  3.2
  4.0 (8A274b)
  </code></pre>
  
  <p>I've tried re-installing the most recent XCode DMG to no avail. </p>