Kami Default PDF Viewer in Chrome?

I used to be able to open a PDF file using Chrome as the default program and Kami would popup. But as of now, I have a newer version of Chrome that does not allow me to do this, as it opens up the Chrome PDF viewer automatically. I believe I have Chrome 60+, is there a way to revert this? I have set Kami as the default PDF viewer in the settings but it still does not work.