MFS does not retain my widescreen settings. Why is this? Can it be fixed?

I have an 34 inch ultra wide screen monitor and every time I start MFS I have to reset the resolution. It seems to default to 1920x 1080. Also i tried setting scaling to 140, but have since moved it back to 100, but this setting is not saved either. I press f11 after I make the changes.
Any idea why this is happening and how can i fix this in the future?