Visual Composer

I’m extremely confused about the theme and how I can use Visual Composer with it. Being able to use a drag and drop feature was a big selling point, but now I’m not sure how to get started with it.

I purchased the Highend theme yesterday and have been trying to make progress building a site today to no avail. Please provide me with the appropriate instructions for (installing? and) using Visual Composer. Is the plugin somewhere in my .zip file?

Thanks in advance for your help!