Sims 2 graphics settings

I have the Sims 2 Ultimate Collection on my PC (Windows 10), and I can't change my screen resolution from 800x600. 

I've done this once before, and I remember it being super easy. All I had to do was edit the graphics rules, though that doesn't appear to work now.

I've tried following all the same steps as last time, but I still can't change the settings at all. Help this dinosaur out? 

Thanks