title: NSUserDefaults in Mac Application
body: <p>I have a couple of questions about NSUserDefaults in Mac OS X:</p>
  
  <ol>
  <li><p>When does the <code>NSUserDefaults</code> use the dictionary provided by <code>registerDefaults</code>? Only the first time the application is opened or every time the application is opened?</p></li>
  <li><p>Where is the information from <code>NSUserDefaults</code> stored?</p></li>
  <li><p>How can I reset some value stored in <code>NSUSerDefaults</code>?</p></li>
  </ol>
  
  <p>Thanks!</p>