How do I remove previous chat sessions from publicly displaying on the website

I have installed the chat plugin for my client to test but it is still displaying the previous chat session in the sidebar. I want it to do the following:
1, popup from the bottom right asking if they want to chat
2, not display in the sidebar
3, not publicly display the previous chat session from another user
Can you please help.
I've am happy to set you up as a user, but I do not want the your support login details to be public here on the WPMUDEV site.