Empty cache in order Elxis to re-build them! Elxis administration -> Tools -> Empty cache.Do also an "empty temporary" files clean up (in Elxis tools too).
the only thing you need to do is to overwrite the ..images/M_images/story.png with your own versionjust as you did to default images in elxis installation the first time!the upgrade overwrote your custom images.as you understand when upgrade some things can't remain the same especially module images.