Hi, you should be able to resize the window to whatever size you want, I did not put any restrictions. Although if you play in too small a window, some of the in-game windows might not be on the screen. See below gif for demonstration.
I am not sure what would cause it to crash though - can you provide steps you use to make it happen? E.g "1. Start the game 2. Go to Options 3. Select 1920x1080...."
Also you can go into Options and resize the UI Scale to make text smaller if you want to play in a smaller window
