Hello! We've just pushed a new update which addresses the bug regarding eyebrows. We also adjusted how the app behave when files are closed. Now when you use the close button on the main window, the app will try to close all currently open files and then shut itself down. But when you use the close button on the tab, closing all files will make the app return to start screen.
We've just tested installing the app on 2 different Windows systems, and found that all of them are working properly through itch.io, so we might need to collect more information before we're able to fix the other bug that you've reported.
As always, thank you for your support and feedback!