I'm sorry, but this resolution is not compatible. Female Forge only supports 16:9 resolutions: 1920x1080, 2560x1440, and 3840x2160.
That alright, still a great program.
Thank you. And sorry again.
I'm working on a solution for the next update (1.0).
use lossless scaling to rescale your screen, also comes with frame generation 8$
Thanks for the tip. The resolution issues will be fixed in version 1.0.