[Plugin: WP e-Commerce Gold] Product page display choice

Hi,
I have the Gold (paid) version of this plugin but can’t find any support for it. I have what I think is an easy to solve problem, but I don’t know how. The gold version has optional grid display and the navigation background is clear. That causes the links texts to be over the product name text and you can’t read anything. I thought if I could assign a background color (not transparent, as it is now) the problem would be solved.

I can’t find the CSS file or the class to change, even though after looking at the files.

Sorry if this isn’t the place to ask, if somebody could help me find a contact info for them it would be great too. It’s too bad they have such a great product but the support leaves a lot to be desired.

Thanks in advance!