Complete A Mega Menu For Squarespace Website

Description

I have bought and installed the above plug-inhttps://www.sqspthemes.com/plugins/p/mega-menu https://drive.google.com/drive/folders/1LVVS2wlmA0ePf5w5g6qEJj5A7XblD8dP?usp=sharing
The megamenu is finished, although some URLs are incorrect. However, the developer says it is impossible to have it on the navigation bar; it must remain as it is now on the website. Is that correct?
I would like the menu to appear as usual from the navigation bar. If you have the coding knowledge to complete this task please let me have your proposal. This task needs to be done urgently.