When you buy the Pay Now Button plugin from the WebAware shop, you’ll receive an email with your receipt. The email will have a link for downloading a .zip file of the plugin. Save this .zip file to your computer.
You then need to upload the plugin to your website. In the WordPress admin, navigate to Plugins > Add New and click the Upload Plugin button at the top of the page.
Once the upload has completed, click the Activate Plugin link and then go to the settings page to enter your Eway credentials.
Updates are managed automatically through the WordPress admin, just like other plugins.