empty menu button on mobile devices

I installed the mobile menu options plug in for my website. And changed it the mobile menu visibility to 5000px. On the computer screen it looks great, but on tablets and mobile phones the website shows a menu button. The buttun does nothing, and i would like to see it removed.

As well i made my own icon for the right top corner, but when i add the image in my media folder and select it, nothing changes in my website…

The page I need help with: [log in to see the link]