Hello, Halber,
Sorry for this belated reply.
I don’t know what each check-box is supposed to do. I just know that what I did worked for me. BUT…I think there’s actually a better solution than this plugin!!
Simply FTP your theme into your site’s main directory: YourWebsite.com/theme — and that’s all!!
This plugin gives us ugly SEO-unfriendly URLs (MyWebsite.com/wp-content/uploads/landingpage-templates/theme/) but the “natural” way using FTP lets you style your URL however you want!!! This is my preferred solution now.
Hope that helps, and apologies again for the delayed response.