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How to upgrade Eclipse Platform itself

For Eclipse 4.2 and above
Steps: 
  1. you first need to add the new release's repository as follows:
    1. Window > Preferences > Install/Update > Available Software Sites
    2. Click 'Add'
    3. Enter the URL of the new repository (for example,http://download.eclipse.org/releases/luna/ for Luna and Eclipse 4.4)
    4. Click 'Ok'
  2. Help > Check for Updates
  3. If updates are found, proceed through the install wizard and click Finish at the end
  4. If upgrading the platform itself, when you are prompted to restart it is strongly recommended to do so. A restart may not be required when updating other features, but always select to restart if you are unsure.
  5. Check your Available Software Sites for release-specific update sites that may need updating as well, e.g. The Eclipse Project Updates URL changes with each release (typically release-specific sites hold the SDK/Source features and off-cycle hot fixes and are not required)
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