Smoothness map not setting
Using version 0.3.7 on Windows 10, the generated smoothness doesn't get set after pressing the "Set as Smoothness" button. I just changed the Final Bias setting and this is not reflected on the set map.

I have this exact issue too. "Set as Smoothness" doesn't work.
I found this fork because I was looking for a smoothness fix on the original. When you press "Set as Smoothness," the result (appearing circled in the example image) not always the same as the preview. Negative final contrast values also do this in addition to final bias. 0.4.2 saw changes to the smoothness shader, but there is still a drastic difference for contrast. Contrast appears inverted in the final result (i.e. high constrast = grey image) despite the preview showing actual higher contrast).