From the left sidebar click SITES then click CHAT WIDGET at the top of the page. There you can edit the chat widget display and the image as well as other settings.
🚨 WARNING: The chat widget may cover pertinent information on some websites. Be sure to go through your website to make sure that the user experience is not effected. Most importantly, go through your checkout process as if you’re a customer to make sure no pricing or checkout buttons are covered.