doesn’t work

I paid for this app and I have had it installed on my mid 2010 17” macbook pro running 10.11.6 and well it loads to netflix and allows me to sign into netflix but when I click on a movie or tv show it freezes and won’t do anything. I have left it for 15 minutes waiting to see if it would play but nope so I have to force quit it because it won’t quit the regular way and when you press the escape button nothing happens there either.I switched to 10.8 but it won’t run on that so I’m stuck with an app that won’t do what its suppose to do oh and I have installed 3 updates for it and still the same results. Either get it working or give me back my money please I don’t like being ripped off. Its called theft you get money I get nothing.

taxes 2013 about Streaming for Netflix - Movie, v1.6.1