Grid/Styling Problems

This plugin seems to be great! However, my menu gets messed up unless I disable bootstrap. When this is disabled the menu issue is solved, but the grid still has problems, as well as the other options. For instance, it doesn’t show thumbnails beside one another, neither the text beside the thumbnails.
I added “.tc-header .nav-collapse {display: block}” at the end of style.css. Does it have to be at a specific place?

https://www.ads-software.com/plugins/content-views-query-and-display-post-page/