I just went to the XTrackCAD site to download another copy of the install package for a different computer and encountered this message at the bottom of the page: You can still download the program, but tutorial and all other links are gone.
Oh that is a bummer. I hope no one takes over to sell commercially like that guy on ebay. I use XTrackCad every day not only for Model railroads, but for small woodworking projects as well.