If you are upgrading your plugins and website to a new major Elgg releases, the following noteworthy changes apply.
See the administrator guides for how to upgrade a live site </admin/upgrading>.
upgrade-notes/5.0-to-5.1 upgrade-notes/4.x-to-5.0 upgrade-notes/4.2-to-4.3 upgrade-notes/4.1-to-4.2 upgrade-notes/4.0-to-4.1 upgrade-notes/3.x-to-4.0 upgrade-notes/3.2-to-3.3 upgrade-notes/3.1-to-3.2 upgrade-notes/3.0-to-3.1 upgrade-notes/2.x-to-3.0 upgrade-notes/2.2-to-2.3 upgrade-notes/2.1-to-2.2 upgrade-notes/2.0-to-2.1 upgrade-notes/1.x-to-2.0 upgrade-notes/1.10-to-1.11 upgrade-notes/1.9-to-1.10 upgrade-notes/1.8-to-1.9 upgrade-notes/1.7-to-1.8