Comet is compatible with the Wordpress auto-update system. If a Comet update is available, it will be shown on your Wordpress dashboard, an alert on the Plugin's menu title, and on the Plugin List.
- From your dashboard, go to Plugins.
- Find Comet on the plugin list.
- Click Update Now.
You can update Comet by manually downlading the ZIP file from the WordPress Plugins Directory and processing like the installation: from your WordPress dashboard by uploading the ZIP file or by using a FTP software. You can check it out here.