Automatic installation is the easiest option as WordPress handles the file transfers itself and you don't need to leave your web browser. To do an automatic install of BWC, log in to your WordPress dashboard, navigate to the Plugins menu and click "Add New".
In the search field type "BWC" and click Search Plugins. Once you have found the plugin you can view details about it such as the point release, rating and description. Most importantly of course, you can install it by simply clicking "Install Now".