For legitimate access to the software or its latest updates, you should refer to the official manufacturer:

Professionals in the construction and engineering sectors can benefit significantly from using Megacad Metall 3D 2012. The software enhances productivity through its specialized features, improves accuracy in design and planning, and facilitates better communication among project stakeholders through detailed 3D visualizations.

That being said, here is some general information about Megacad and Metall 3D: