Okay, I don't want to give this guy much grief, hence cutting off his name. I see this often enough he could represent a number of people we may know in our lives. It's a sign of a far bigger problem in our culture.
Setting aside the bullshit that is charging people 10USD to view files made on a CAD program that can costs hundreds (Want to see the mock-up of your commission? 10 bucks, please!), we have to bear in mind that there's no trial version of this app, and the word VIEWER is in the name, to say nothing of the full description.
That means this guy paid a full ten US dollars to use an app, only to give it a one-star review because it won't do what it never claimed to do in the first place.