I can't install Vegas on my new computer. I installed it on my old computer but then that computer crashed. Now I have the CD that came with the software, and I used this on my new computer in the CD tray to install the program manually. Except here's the deal, the new computer of mine here wants me to enter the serial key. I do not have any serial keys on any area of my CD folder which contains this CD. How can I retrieve my serial key again? I already bought the product.