There is no settings from the main menu, but im guessing you mean "Setup" Unfortunately, none of the Function Keys work in both Setup and Accessibility menus
that's... quite odd. I'm not quite sure what's going on there.
...wait, does your keyboard have a function key or a function lock key or something....? like, is this a full desktop keyboard or is this a laptop keyboard, or what...? if it's a desktop keyboard can you perhaps tell me what keyboard it is so I can look into the keyboard in question...? I probably can't afford to get one myself but I can at least see if the f9 key not working in some programs with it is some known issue with it or something.
it's the only thing I can think of, f9 works just fine on my own keyboard so I have no real way to figure out what's going on over on your end. also, are you sure f9 works in other programs? perhaps the f9 key is simply broken on the keyboard...?
wanna help however I can, I just need to get as much info as possible before I dive in with potential solutions. wouldn't even mind sending you some private test builds to try and diagnose it that way if it comes down to it as a last resort. could start with, say, adding f5 as an alternate option for pulling it up if I do go the test build diagnosis route. or maybe I can find room to add another proper button for it somewhere... hm...
oh, I see. yeah, really not sure what's going on, but the next update (whenever that actually releases) should make F5 another option, which should *hopefully* fix it. but also I made some changes to how it detects F9 (it used text and only checked lowercase "f9" and not "F9" so I wonder if that was the problem), so F9 itself could work in the next version for you too? we'll see I guess, hopefully one of those two fixes works for you either way once it's out! sorry about the inconvenience in the mean time.