If you are having problems with the thumbnails not showing up you can try the following to see if it resolves the problem. In the file functions.php there are 2 functions named prepsimageurl($src). One of the functions active and the other is commented to disable it. The commented function has a /* at the start of it and a */ at the end of it. What you need to do is put the active function in commented state and uncomment the inactive version of prepsimageurl($src). Just follow the pattern for commenting by mimicking the currently commented version of prepsimageurl($src). In other words, switch the /* */ from the inactive version of prepsimageurl($src) to the active version so that the inactive version becomes the active version and the active version becomes inactive. If you have problems getting this done I’ll be more than happy to help. Just contact me via the contact form. Important: Please do not attempt the file edit unless you are confident of your ability to make the change without creating an error in the file.