@GOBLYN QUEEN that link should take you to a forum thread with a download link. You'll then download the launcher from the launcher link on that page, and then extract the contents of that archive file to your desired location. There is a chance that you're using a third-party archive extraction tool that requires a serial number to fully unlock.
However, there are some free solutions such as 7zip, that are free to use. Let us know if this doesn't help.