Hello!
I'm sorry for taking so long to reply through here. We usually come on itch more or less when we are about to make a new release. The quickest way to reach us is either through PM on Patreon or on the discord community: https://discord.gg/qTx9Csv
We had removed the ability to go full screen because many people were having crashes to desktop while playing in directx11. This is an issue with unreal engine that we haven't find a solution yet.
It seems like your problem is tied to that, so we will try to release a hotfix for the resolution this week. Probably we'll have to put a warning to tell people not to use full-screen in directx11 and set the default engine version to directx12.
Sorry for the delay to reply.