I have problem with my n810. I want to click on left appliaction menu and lunch some application. BUT, menu is empty, so there is no app, moreover there is no category (for example "Utilities, Settings, ..). I don't know why it is, but I can't lunch any application from menu (e.g lunch "Backup" for backup all settings and then reinstall OS).

Please, can someone help me? Thanks for quick suggestion