Full screen and resolution issue

I know this problem has been dealt with many times but everything I'm finding is doing nothing for me. My red dead updated for christmas and now will not let me change any of my resolution settings. I cant take it out of borderless windowed. My pc settings for display are on the correct settings (1920x1200) but red dead will ONLY let me use 1280x1024 and will not let me change it. Any idea what I can do that isnt super complicated like messing with files? I'm slow as hell and don't trust myself with anything like that.