Hmmm, I'm not seeing any way to execute URL commands via Auto Dark Mode's custom scripts (plus I don't prefer having Media Network enabled, as it slows down closing MC and I don't need it when I have the Pi doing Media Network stuff), is there a command line or even a core command available to do this via the MC31.exe stub?
Something like this maybe for the command line...
MC31.exe /Skin "Modern Cards: Mica Grey Edition"
EDIT: I see you can execute MCWS from the command line too, but it doesn't work with Auto Dark Mode's scripts no matter what I've tried. In fact, I can't even get it to work correctly via a batch script. Pretty sure it's the question mark in the command that's causing it to not work with either Auto Dark Mode's scripts or via batch script. Unfortunately I'm not a developer and I don't have too much time to mess with it. Back to the drawing board, I guess.
EDIT 2: Okay, finally got it working using batch scripts, YAY! That wasn't fun...
EDIT 3: Whew, got it fully working now, DOUBLE YAY! When Auto Dark Mode changes Windows' theme to the dark theme at sunset, MC will change skins alongside it. Likewise when it changes Windows' theme to the light theme at sunrise, MC will change skins too!
Thanks Matt for the hint!