Mega-menu problem

I have a problem with mega-menu in Porto theme http://themeforest.net/item/porto-responsive-multipurpose-wordpress-theme/9207399. I installed the plugin Menu Image and now instead of mega-menu displays the usual drop-down list. I have disabled the plugin, but it did not help and the menu still looks awful. Is there any way to restore the mega-menu without restoring a backup of the entire site? What files are affected by your plug-in? It may be enough to restore only them?

https://ww.wp.xz.cn/plugins/menu-image/