The game now supports UI scaling. It is basically just scaling up the entire window to fill your screen, so the game will appear a bit pixelated if you use this option.
To activate it, just use the video options panel to set the game to a lower resolution (like 1280 x 720) and make sure you select Window Mode.
When you restart in Window Mode, press F10 to toggle full screen mode.
Note: This scaling is a feature of the game engine I use. The main drawback is that the windows mouse cursor can sometimes appear over the game window when scaling like this. It should not actually cause any problems or interact with the game in any way, but it might be distracting.
If you do not like that, consider using Full Screen mode at a lower resolution that your monitor supports.