add_filter( 'gform_secure_file_download_location', '__return_false' );
I do a fair amount of Gravity Forms to posts. Many times those posts have files, mainly images, associated with them that I’d like to have embedded in the post. Gravity Forms did some changes a while back to prevent people from guessing where files are (which is good) but the secure URL change also made my embed patterns break. Throwing the little line above in a plugin makes things work again (although at the risk of people guessing where other files may reside).