Assuming you have acquired the package from a trusted archival source, follow these steps:
The update added eight new materials (oxygen, sulfur dioxide, methane, nitrogen, argon, ammonia, etc.), bringing the total to twelve. Atmospheric Opacity & Tinting: universe sandbox 2 v3411 full
: You can now completely swap one material on a planet for another with a single click. For instance, you can replace all of Earth's water with liquid methane to see how it affects the planet's appearance and climate. Universe Sandbox 2 v3411 Full: The Ultimate Guide