Visualizer 3D will not accept the activation code, what is the problem?
If you are trying to install Visualizer 3D on a different computer than before, you need a new activation code. Windows Vista: If you are working with an older version of Visualizer 3D you have to start the application explicitely in administrator mode. The document “How to run Visualizer 3D on Windows Vista” describes how to run Visualizer 3D in administrator mode.