Update wordpress theme and fix WPBakery Visual Composer

Hi. I have a site who has the theme [login to view URL] I havent updated the theme in a long time, because the new one has a new version of visual composer. In other words, theme works fine, but when update the main page is being screwed (because visual composer changed the code standards) Task. 1. update theme 2. fix main page: it has to look like the original version. Work needs to be done from 11 pm to 6 am US central time. If its not finished project wil be cancelled.