Hi! Most likely the archive wasn't fully downloaded, which is why it's showing as invalid. Try re-downloading the file and see if that helps. Let me know how it goes!
tried downloading it three more times and the same message pops up. (I am using windows)
Thanks for the report! Yes, that does sound strange. Please email us, and we’ll send you direct download links — that might help resolve the issue.shadowportalgames@yahoo.com
