Catch Sticky Menu plugin with ScapeShot Pro theme not working

Hey, I've been using the Catch ScapeShot Pro theme for sometime now and I'm very happy with it. However, I just realized that my top navigation menu wasn't sticking to the top. I have to scroll back up to the top of the page to access the menu. So I did some research and found there is a Catch Sticky Menu plugin made by you guys. I installed it and tried to set it up with different desktop and mobile css selectors but I just couldn't get it to work. Can you please advise how I can make my top nav menu sticky using the Catch Sticky Menu plugin? Here is my site: https://penchantapp.com/ Thank you!