specify featured image for posts without one

Does Enfold have a setting where I can set a default image as the featured image for posts or pages that don’t have one?

When I try to share posts that don’t have a featured image, an image from another post goes with.
(example link in private content – image from another post is assigned when you try to share to facebook through Jetpack Publicize.The image being pulled is the same one each time, from a post created with Events Calendar Pro). Could be a plugin issue, but thought I’d see if the theme has an override first.

Thanks