title: Eclipse Indigo Android ADT - install OK, no "Android" option in Preferences and New Project
body: <p>I have Eclipse (Indigo Service Release 1, Build id: 20110916-0149) running on Win XP.</p>
  
  <p>I've added 
  <a href="https://dl-ssl.google.com/android/eclipse/">https://dl-ssl.google.com/android/eclipse/</a>
  and installed 4 plugins, including ADT, and restarted Eclipse.
  Installed software list shows Android plugins are installed.</p>
  
  <p>But nothing appears in Preferences, and there are no Android-type project in New Projects.</p>
  
  <p>Later I check Eclipse's directories and there were four *.jar archives with these Android plugins, and they weren't unzipped to corresponding directories (like other plugins). I unpacked them so directories same as *.jar names, and started Eclipse again, but nothing happens.</p>
  
  <p>How can I work with ADT plugin in Eclipse?</p>