I have installed the release 2.1 version of Topaz DeNoise and am still getting that green effect in one of the dark shadow areas of that same picture.
Topaz-DeNoise21.jpg
Topaz-DeNoise21.jpg (118.29 KiB) Viewed 1213 times

However, a similar picture taken this past weekend of the same basic scene does not have the green effect in it when denoised:
20081018-006--Yate's-Mill.jpg
20081018-006--Yate's-Mill.jpg (116.94 KiB) Viewed 1213 times


And I have been using it on other pictures I have been working on the last few days and I am not getting the green in any of them. Other than it being slow, which I think that is as much by design as anything else, I like the program.