If you look in your SwCpoker program folder, and then the general_images folder, do you have that "btn-notes" file? That's the image for the icon.
I don't have a general_images folder, I have a general_images.zip file. Inside it there is that file, but it has a bright yellow N in it that I'm quite sure I've never seen. It's kind of hideous, actually, and I'm a bit glad I don't have one, so I'm not going to experiment.