After purchase, you will be redirected to a page where you can download the plugin. Save it to your local hard drive, then go to your WordPress admin under the “Plugins” menu and upload the zip file of the plugin. There you also will find the license key. Once you start Campation PostOffice you will be asked for this license key. When there are updates, you will be informed in WP admin as for any other plugin. Campation PostOffice supports “automatic updates”.