I can't change the resolution at all, the drop down is empty. Changing the values in graphicSettings.lsx has no effect either, it just starts up in 800x600 again. Am I missing something obvious?

Primary monitor is 1920x1080 @ 72hz, but I've tried switching to a non-custom 60hz resolution and I've also tried disabling my second monitor, to no avail. For some reason the game can't/won't display available resolutions and it won't let me force it.