hide feature post

I am not very techie and WP worked great until it changed (improved?). To display the artwork (my wife’s) I need the featured image on the list page but do not need it on the individual page. It always seemed silly to have a featured image only to then hide it. I saw the fix with the programming the CSS but that is beyond me. Any simpler options?

The page I need help with: [log in to see the link]