Missing Options button in Player window

I have suddenly lost the Options button in the Player window - I've used this before plenty of times, no clue why or how it has now disappeared. It should be right below Colors & Effects and Text Labels (see image attached)

I'm on the latest version (Update 5: 1401.2415) and running Windows 8.1. I've used this same machine/install for other projects and have used Options before (required for all our projects to "resize with browser"). Any ideas? What am I missing?

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