Thats the Problem, the link you sent basically says "Go to Netflix in the TV and Movies section". But ithe issue is that it is not there on her version of the program (which according to the 'about' is the same as mine.
Additionally the website says either 'congratulations you have it' or 'you need to upgrade your OS' when it comes to the program. But it does not offer any assistance on making the program display the Netflix 'button' if it is not present. And I can not find any place I can download the program, otherwise I'd try to uninstall & re-install.