Menu problem

Hi,

I instaled the plugin but I can’t click on the menu because the theme’s menu it’s above it. I am using ReadMe theme (by PixelWars), here’s a link to see what I mean: http://inkstory.eu/knowledgebase/

P.S. Sorry for my English.

Thanks for advance,
Panos

https://ww.wp.xz.cn/plugins/wp-knowledgebase/