I exported an XML file of my project, then tried creating a new project from it. There was an error message which was forwarded, but the project displayed properly in ADE except for models which were absent from the model list as well as the source files. I deleted all models and compiled. The build listing was short but indicated no failures. However, the package did not contain a world folder with the airport .bgl files, just the scenery folder with the model library .bgl files. Reasons?