Hi Cecilia, we are happy to answer any questions you have about working with our WordPress themes!
Do you want to hide the featured images on both the Blog archive and Blog single pages? If so then the following CSS snippet should allow you to hide those images:
article.post .entry-content .wp-post-image {
display: none;
}
Featured image management is admittedly limited in our Pavillion theme and if you ever decide that you want to try out a theme with more customization options then I hope that you will give our other WordPress theme Crio a shot! The theme framework that Crio is built with has a number of improvements over our Pavillion theme, including the ability to adjust Featured Images on blog pages, and I hope you enjoy using those features is you decide to try it out.
Please let us know if you have any other questions for us!