I GOT IT!
What I came to realize about this forum is that you either of no solutions (ref: https://appfinite.com/topic/how-to-show-specified-featured-image-only-and-not-post-images/) or advice someone to pay for something!
C`mon! I spent money to get this theme, right? Why do you guys behave as if it’s just a volunteer thing to work on problems with your theme? And here I mean >> https://appfinite.com/topic/how-to-show-specified-featured-image-only-and-not-post-images/