doc, unfortunately, there "is" a way to extract them. we had another stacker figure it out, but asked not to post the instructions for this very reason.
i would contact him and/or his host for using copyrighted material.
PM me if you need help. this hasn't happened to me exactly, but i've had tons of my themes re-posted on other sites, with NO credit -- earning some schmuck some google ad-sense money from my hard work. its very stressful. sorry it happened to you