Hi,
If you don't show any bug report, the simple solution I think, and i hope that's the good one, is to change your theme (Control Panel -> Apparence and Personalization -> Change the theme) and don't choose a classic theme.
If it is not working, search if there is an error.log near the .exe.
If there is nothing, problem may be on nwjs. So we had to understand what do that, and let an issue on their github...