How to change the size of the gaming window?

[Fyrus Carmin]

Well, you can only change the size with the Setup.exe so, did you make sure your options were still changed after you closed your setup ? Checking a second time isn't bad.

Another solution you could use it to use ROExt, as it allows you to set any size you want to the game. It requires diving a bit into configurations, but it's not really hard to understand.