The -S requirement will be lifted in the next build.
Not sure why you're getting that other issue with going fullscreen. I will look into it, but I run 4coder on windows 10 once in a while without seeing it, so this is going to be a tricky one. Is there any chance you can provide more info? Graphics card, and anything else you think would be relevant? You can send it to [email protected] if you want to be discrete about any details.
Yes I hope that will be enough too, these things are always a little hard to track down. I will announce it everywhere (here, twitter, patreon, itch.io) when I get a new build ready, I will try to address the issue there somehow, so let me know if you see any difference and then we'll go from there.