Main Menu buttons not working

[Big Strap]

Hey all,

So I'm on a mac, and none of the menu buttons work for me as of this new update. I've tried verifying the game, reinstalling completely (and verifying again), and sacrificing a goat to the Kraken, none of which has resolved the issue. My install is completely unmodded, and I've never subscribed to a ksp workshop mod. Also the game starts in a tiny window which I have to manually fullscreen (EDIT: fullscreening in the launcher didn't help the issue) , but the menu buttons don't work in either state. The menu buttons will highlight normally when moused over, but don't do anything. When I try to select them with the arrow keys and press enter, the button stays grayed out. Any help would be greatly appreciated! 

Attached is an image of what it looks like: 

Edited October 22, 2019 by Big Strap
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[Big Strap]

I've tried restarting, reinstalling, and reverifying in every conceivable combination but no dice. Has anyone else encountered this problem before? I'm on OS Mojave.