Lol, I've been trying to turn it off also. I can't find the option to do it though. If I find it I will let you know. It is very annoying
On the top right of Active Trader Pro, there is a "setting" button with a drop down. News and Alerts are there. I see that you can disable the news articles there and on Alerts you can deactivate the news pop up. I think this will work but i haven't tried it long enough to know.
It worked, thanks.