It seems to be impossible to resize the game window, which is a problem because it's comically small on my (3840x2160 resolution, Windows 10, if either of those matter) screen. At first I could hardly see any words, and then while I was trying to adjust it, it became so tiny that literally only part of the top bar and the outline of the window is visible.
I've tried looking up how to resize something in Windows, but apparently Windows just assumes everything you open is resizable. What do I need to do to actually resize the game window?