Hi! OpenBoE detects the largest scaling option that will fit within the resolution it detects from your operating system, and doesn’t display the higher options. So out of 1x, 1.5x, 2x, 3x, and 4x, it seems to think 2x won’t fit on your screen. I’m wondering if you are using the system setting on Windows that automatically scales windows up for a high-res monitor? I haven’t accounted for that. If you are, setting your Windows system preferences to have a 1X scale, might make the 2x option appear in OpenBoE.
That’s just a theory and I know it would be inconvenient to change system settings every time you play the game — but it would help to know if that’s what’s happening. And if it doesn’t work we can try other things.