You aren't supposed to just type MMFApplications, I think.
I made a video to show you where the MMFApplications file is.
https://drive.google.com/file/d/14Qd55OhXrN8vRM0sZ242QFBjjFe7b6Cx/view?usp=sharing
I don't know why it just downloads directly onto your computer, but oh well. The question mark is my username, by the way.