How to scale mod GUI for 4K

[PTNLemay]

I've tried every trick I can to get KSP to stay in 1920x1080, running as administrator, disabling full screen optimization, that "Change high DPI" trick.  No matter what, after a while the whole game resets to 3840x2160.  The frustrating part is that the vanilla game now has an actually very good UI scaling.  I set it around 170% and everything is very readable.  But all of my mods stay absolutely tiny.  And if anything the size difference between the two makes it even more annoying.  Some mods do come with UI scaling (Kerbal Engineer Redux thankfully being one of them) but most of them seem stuck at unreadable resolutions.

I tried to look up solutions, but the forums are just full of people trying to find solutions to the vanilla UI scale, which I think has since been fixed.  So is there some way to force the mods to scale?  I'm not afraid to go edit some ini files myself if that's what it takes.