Solved plugin looping a code?

Hi there

I've an issue with Divi Life's Overlays plugin on. When the overlay is activated, the menu becomes non-responsive on desktop. Example page: https://www.sarti.co.uk/sarti-at-home-pizza/ (click the "Delivery Prices" button and you'll see what I mean). Divi Life support have been looking into this for a while, and this is their solution "We have narrowed down the issue - Can you kindly update the Divi Ultimate headers plugin and test the issue again, the issue is with the plugin looping a code - if the issue does not resolve with their update, we can apply the fix from our end." However, I cannot see how to upgrade the plugin. Sorry if this is a daft question, but would be grateful for any suggestions. Cheers, James