Resolution Differs between Windowed and Borderless:

So something changed in my computer overnight because I have now developed a new bug.
When the game is using bordered windows, the resolution appears to be scaling the game within that frame. This means that a 720p frame results in the game running just below 720p. The only way to fix this is to run the game borderless. This has just recently developed (possible an intel driver update?) and is now preventing me from using the world editor.

I have a 2.8 core i7 w/ intel iris 5100 and 16gb RAM. I have windows 10 64-bit running via bootcamp.

Game starts in 720p borderless:

I re-enable borders:

Game is now not in 720p: