I don't understand why software like that is so expensive and you have to pay that every year to renew it? I had the same problem with converting 3D Warehouse models into Trainz, RubyTMIX can do the conversion but I had to pay $300 a few years ago for one year for the version of Sketchup that would create files that Ruby could read. There is a free version of Sketchup, but it's limited. You need the Pro version which is $300 for one year. So, I can't convert any more buildings because of the cost. I have to ask people like Dave Snow to make something for me like hotels and train stations which he did.