Would you mind sharing a link to your site where you are using the plugin. Please keep in mind that the “inside a div” option is more advanced. It expects that the wrapper div have the appropriate responsive CSS functionality already built into it, so the box simply inherits it. If you don’t have this, simply fallback to the column options.
Hate to tell everyone but I have been getting emails from tons of people who purchase this “product” and get absolutely NO support whatsoever. Consider it a cheap loss of money. I did. I have no idea how to tell people NOT to spend their money on this piece of junk, but there you go.