JPEG to RAW doesn't fix my image

Hi,

I’ve just bought JPEG to RAW 2.2.1 since I tried the trial version an year ago and it worked extremely well on removing JPEG compression artifacts. However, I was puzzled to see that now it doesn’t seem to remove the JPEG artifacts in on of the images I need cleaned. Please see attached the image I’m trying to get rid of compression artifacts. I tried all slider settings and combinations. Any help is greatly appreciated.

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Another thing I noticed is that it also doesn’t seem to remove banding in skies very well anymore too. On the promotional webpage for JPEG to RAW, there’s a before-after example with a sky. I downloaded this image and tried to replicate the results. Whatever slider combination I tried, I couldn’t make the sky as smooth as in the “after” example image. Please see below.