In which file I can modify certain code class?

I’m riding a code html (advanced html- code) where this section is added in the code, it is added to the bootstrap class="container-fuild" that occupies the entire viewport.

See the screenshot here

For the template I’m riding, I need to change this class to class="container".

I advanced searches in the database, the sublime text and Windows in which the plugin file enters this class, but I found /:

DO you can you help me?

https://wordpress.org/plugins/showcase-visual-composer-addon/