I have downloaded WPMU DEV so i can add it to my WP Engine

I have downloaded WPMU DEV so i can add it to my WP Engine account. When the file downloads it gives it to me in a PHP Format. The instructions (Which are not very clear at all I had to go hunt them down in the forums) states to upload the zip file . There is no zip file. It is a PHP File . Please advise I have included a screenshot of the PHP File . Please advise on how this needs to be handled.