I like the header and footer graphics. I dont think there is a problem with the red line that -Alex- talked about. It does extend beyond the rest of the layout, but I dont see that as a problem.
My biggest suggestion is to expand the layout. I think it is too narrow.
I have another concern too - Is this your software? or do you just have resell rights? I think the idea of having google ads on the site takes away from the credibility of the software/seller. In my mind, if i saw that site I would I would think to myself "This software cant be any good if the guy selling it has to make his money off ads rather than the software itself".
Finally, I agree with JayB about the menu colours. I think bronze does work, but the gradient just isnt working for me. I think you might want to make gradient more subtle, and change the text to white... see how it looks. Or even try some tab style menu buttons.