I recently decided to upgrade from Limewire to Limewire Pro through the pop up window at the start up of Limewire that took me to Limewire.com to where I proceeded to purchase the upgrade. After making the purchase it sent me to a window to download the Pro version for my operating system, "Windows". While running the installer I recieve a NSIS Error saying "The installer you are trying to use is corrupt or incomplete. This could be the result of a damaged disk, a failed download or virus. You may want to contact the author of the installer for a new copy" What do I need to do now?