I'm moving from Autocad, and had downloaded the demo of Bricksys, in which all went well. Now, after purchasing a license, I've re-downloaded the application, and when I launch I get the error - "Main User Interface Customization file not found", and when I get into the app, there are no menus at the top or side. Any ideas what may be going on? Not a great way to encourage people who are thinking of switching from Autocad. Thanks for any insight anyone can provide.