This addon is a plugin. You need to extract it to your /plugins folder to install it.
Plugin adds a small trigger near textarea (or it's label). This trigger allows you transform textarea to a wysiwyg editor (elRTE) with file manager (elFinder).
CHANGELOG ========= 1.2.11 (10 Jun 2011) - changed trigger view, now it is looks as tooltip - updated vendor elRTE to 1.3 - changed loading of jQuery UI / CSS from Google CDN server - removed unused files - started changelog