If you are looking for the experience provided by SSM2007 version 5.31, the simulation community has largely moved on to more modern, open-source, or actively supported alternatives that don't require searching for risky activation keys:
The search for a keygen (key generator) usually stems from three main scenarios: space shuttle mission 2007 5.31 keygen
Contains a very sophisticated Space Shuttle flight model that is open-source and free to use. If you are looking for the experience provided