title: Eclipse is saying "Update Android Developer Toolkit"
body: <p>I've somehow managed to mess up my Eclipse and Android set-up and I'm not sure how to fix it. The symptoms of the problem are as follows:</p>
  
  <p>In Preferences > Android, I try to select the location of android-sdk-linux, when select the error appears "This Android SDK requires Android Developer Toolkit version 20.0.0 or above.  Current version is 18.0.0.v201203301601-306762.  Please update ADT to the latest version."</p>
  
  <p>Going to Help > Check for Updates in Eclipse, returns no updates found</p>
  
  <p>Going to Help > Install new software and selecting work with ADT Plugin - <a href="https://dl-ssl.google.com/android/eclipse/" rel="noreferrer">https://dl-ssl.google.com/android/eclipse/</a>. Selecting Developer Tools and next, returns</p>
  
  <p>Cannot complete the request.  See the error log for details.
  "Android DDMS" will be ignored because it is already installed.
  "Android Development Tools" will be ignored because it is already installed.
  "Android Hierarchy Viewer" will be ignored because it is already installed.
  "Android Traceview" will be ignored because it is already installed.
  "Tracer for OpenGL ES" will be ignored because it is already installed.</p>
  
  <p>If I then take a look at what is already install, Android Development Tools is listed and the version is 20.0.0.v201206242043-391819</p>
  
  <p>Now for the interesting part:</p>
  
  <p>If I go to Help > About > Installation Details > Features is lists Android Development Toolkit as Version: 20.0.0.v201206242043-391819 but if I then go into Plug-ins it lists Android Development Toolkit as Version: 18.0.0...</p>
  
  <p>Sorry for yet another question on updating the ADT as there already seem to be quite a lot of questions on the topic but I've tried the typically solutions and they does seem to be getting me very far</p>
  
  <p>Some extra info, that people often ask for
  OS: Ubuntu 12.04 LTS
  Eclipse Platform: Version 3.7.2 </p>