I've played KSP1 and 2 through Steam for ages, and I'm a screenshot junkie - but the problem I keep running into in KSP2 is that whenever I hit F12 (the default screenshot key for Steam), it brings up AeroGUI. (I'm guessing this is a KSP1 mod integrated into KSP2, because I have not downloaded any mods for this!) Having to double-tap to get screenshots gets a little irritating.