Change smooth scroll animation

Hi,

Is it possible to change the scrolling animation and speed for the menu links? I found a plugin that does this for text anchors, but is it possible to make this plugin work with the menubar of this theme? If not, can I replicate such animations by editing a file within the theme?

Thanks a lot!

See this plugin;
https://nl.wordpress.org/plugins/easy-smooth-scroll-links/