I purchased and installed Trainz 2012 a while ago. Had problems with heavy lag in-game and didn't use it. My son wanted to try it now, but it will not run. I get an error message about unable to open asset database and to restart my computer to fix that. I do not think that will help. Another suggestion is to reinstall. I don't want to uninstall because I can not find the installation file to reinstall it. Any suggestions?