Gethrodrak

Hello everyone. I have problem. I bought LG 49UH600 few days ago. And I tried to use applications, but there is no possible to upgrade them. Its also with LG store , It cant be open. I only can use WEB Browser. I searched over the internet and found out that I have to register account for my TV, and that I could do it in quick settings- advanced - general - Account Management But when I go to advaced - general - there is no account managment option at all. What to do ?