Below are the steps
Login to Admin portal if not already logged in.
From the left sidebar navigate to the Team section then click on edit icon next to the Bot, as shown below.
In the edit screen click on edit button next to default profile image to upload a new image. You can also update name of the bot from same screen.
Upload the file by clicking on Choose file button and adjust the uploaded photo accordingly.
Click on Save Image button to save your profile image.
Click on Save Changes button to save your changes.
To view updated changes please refresh your website where AI chat is installed.