Prevent live chat opening new windows

Hello

We have integrated this live chat on our website. It works fine, but a big flaw to the software is that each time the user clicks on the live chat icon, a new chat window opens up.

In other words, if the user starts the live chat, and clicks anywhere outside of this live chat window, it’s now hidden.

If the user clicks on the live chat icon once more, a new session starts.

Surely there must be a way to re-open the existing live chat window?

Thanks!