Hi Railfan
Your video download OK here (Old Vista system) and loaded with no problems to VP Professional 7.51 where it played perfectly. (GOSH what a long train!🙂......Neat, no frills video) I exported this as an mp4 1920 x 1080 Default quality H264 Video clip which played perfectly in VLC.
Exported as a DVD video. All 91 wagons passed without a hitch!
It certainly sounds like you have a problem at your end. Have you tried a re-install of the setup file? Save your project file and clear unused files from the cache.
Nat