Please Help!

While using Chome today a message poped up and now will not close. It states I am using Google Chrome version 44 and should update my broswer. I did NOT click the "OK Button.

I can not close out Chorme or any other tabs that are open. It will not allow me to shut down the computer at all nor clear the browswer history. I can not even minimize the screen. I have tried to use the Malware bytes Anti-malware for Mac but it did not detect the problem.

Please help

Thank you!!