When I turn Driver4VR on, the program window is visibly fine at first. However, when the program actually starts, scaling of the window revert back to original 4k, which is quite tiny. BUT, this is not the real issue. The issue is that when you go into the calibration window, the window itself is small but the texts and buttons are too large. They go over the boundaries and became illegible. It took me quite some guessing and trial to get the program to calibrate correctly.