In the Results Viewer, the 3D Visualisation is a separate way of viewing your data. It can be accessed by selecting the '3D Visualisation' item in the Tree View.
When this is selected, the TBD file associated with the results file (visible and editable on the Simulation Data page) will be loaded. If it cannot be found, a file dialog will be displayed for you to select it. Ensure that the TBD file is available and not currently open. If the TBD file needs evolving, you must open it in the Building Simulator, evolve and save it, and then return to the Results Viewer to use it.