Dear ANDREW SCOTT,
Thanks for you good feedback : in fact I notice that you say my software to provide with GOOD results !
Yes, I find you are a bit "ungrateful" in your notation, for a FREE software in early version 0.4..
I don't really see why a "3 slider app" (+ 1 now for sharpening) should be so hard to understand and handle. But, I take notes about your comments.