Hi, I purchased Parallels at version 4, so I have a license key. However, I recently wiped my drive and reinstalled OS X, so I lost my applications. Now the only downloads available on the Parallels website are the newest version, 6, and the previous, 5. Where could I find a download for Parallels 4 so I can continue using my license key? I can't afford to pay the upgrade price right now, so I can't just upgrade to 6. Thanks in advance.