Window mode issue

I'm running Skypia on my Windows 10 PC. I found that I cannot change the game screen from full screen to window mode. Changing to compatibility mode (e.g. Windows 7) or adjusting in-game setting (Like pressing Alt+Enter) still didn't help. As I'm using a 1920x1080 wide screen, I find it a bit uncomfortable playing in full screen mode.
Please suggest possible advice. Thank you.

- Try to change your screen resolution lower, like until 1280x

This usually happens to computers with high screen resolution.

If this didn't work, please post here again.