This is a tutorial for anyone struggling to understand how Effect Masks are meant to be used. It was done using MEP 2013 Premium but the steps should be identical or very similar in earlier premium versions.
That effect mask Oval8_1920x1080.jpg is included in MEP 17, MX and 2013 (premium versions) assuming you've added all extra files via Help > Free download. And as the tutorial says, it's just an example. There are 34 in the folder here.
And the post clearly says: "It was done using MEP 2013 but the steps should be identical or very similar in earlier versions."
Yes, I agree. Effect Masks is one of the features not included in the basic versions (both MX and 2013).
Looks like I've slipped into the bad habit of assuming everyone knows I have the premium versions. My tutorial was carelessly headed, and should have explicitly said 'It was done using MEP 2013 Premium'.