The portrait enhancer worked great. I then tried to enlarge the pic 2x, but the blur and noise sliders appeared to do nothing to the pic. I tried 0 to 100% for each: no effect. Does your web site have a bug that disabled the slider function? I also tried the "automatic" option for blur and noise. That didn't help either.
I'm trying to reduce the jagged edges and striation artifacts, e.g., on the singer's hand in the attached pic (left is after portrait enhancer alone (which only improves the faces), right is after 2x enlargement
with both sliders on 100%). (You will need to zoom in to see the issue.)