You can use the built-in installer (suggested) or if you know how to handle a Zip file and use FTP,
download the zip file and extract the contents, upload the 'easy-automatic-newsletter' folder to your plugins directory (wp-content/plugins/).
Activate the plugin through the 'Plugins' menu in WordPress.
Now go to Admin Panel and then Easy Automatic Newsletter Lite to configure any options as desired.
Requires: 3.3.1 or higher Compatible up to: 3.4.2 Last Updated: 2012-10-9 Downloads: 20,578