Screen Size

I just downloaded Uprising Dekaron, and the screen is too long and not wide enough, how can i fix this?

I go to options and i know how to change the numbers but idk what i should put in to fix this awkward size. Its unplayable because i cant log in

Change it to 800x600 then go in game and put max resolution.

"bin\option.txt"

Line 22 : display 800 600 32