It is normal that Lite version does not include max files in some categories (because they have not Lite samples), but not the thumbnails.
I just installed RC Lite 1.4.2 here, and the thumbnails seem correct (Sunshade, Roads, Sidewalk).
Please, delete the folder C:\Program Files (x86)\Itoo Software\RailClone Lite, reinstall and send us the file install.log that you will find in this folder.