Getting a double / duplicate menu

Hi, I’ve been trying to get this right but somehow i get a duplicate menu with your plugin. I’m using Centum theme from themeforest.

See it here: http://dosco.nl/cms-login01/

I really hope you can help me out, I do not detect different names so a simple display:none on the div or class will not work.

Regards
Sylvester

https://ww.wp.xz.cn/plugins/megamenu/