How to Upgrade Eclipse Indigo to Eclipse Juno 4.2

It is possible to update Eclipse Indigo to the new Eclipse Juno while preserving your settings and (well, hopefully) everything else. Note that some plugins may not support the new Juno release yet, so consult your specific plugins release notes and updates to check this. Also make sure you make a backup of your Eclipse installation – just zip/tar the whole folder and if something goes wrong you should be able to just unzip/untar it back to its original location like nothing happened.

Add new sites to my "Available Software Sites" (Help -> Install New Software -> Available Software Sites)

http://download.eclipse.org/releases/juno

http://download.eclipse.org/tools/cdt/releases/juno

Then just initiate an update (help -> install updates).

After the update

http://download.eclipse.org/eclipse/updates/4.2 had been addedhttp://download.eclipse.org/eclipse/updates/3.7 had been disabledhttp://download.eclipse.org/tools/cdt/releases/indigo had been disabled