All menu items highlighted

I’m currently using the Highend Theme with the Scroll to id plugin for a one page website. I would like menu items to highlight when hovered over and when viewing the part of the page where the relevant Scroll to id anchor exists. When in Appearance-> Customize, the menu behaves this way however in the live version all of the menu links are highlighted. I’ve attempted adjusting the Scroll to id settings, emptying my cache, and through additional CSS but nothing seems to work. The site is stoneybrookecap.com.

Any help would be nice. I’m new to this so let me know if any more information is needed. Thanks!