I'm kicking myself for upgrading to El Captian which I think might be the culprit.
When I go to the render queue I cannot select any of the settings. They are highlighted
but they won't open. I can use the arrow button next to the text button on Best Settings
and Lossless but when I want to choose where to Output it does nothing.
It's really bizarre. I've tried rebooting, deleting cache, different keyboard and mouse still
nothing. Thanks in advance.
You're almost certainly correct on the El Capitan deal. So you know what to do: revert to the previous OS. I seriously doubt there is any "must-have" feature in the OS that trumps having a workable application.