I'm on 2.0, how can I use this mod?

Download and enable the latest 0.X.Y version of this mod! The newest features will be on the version made for 2.1, but things that can be backported will be until 2.1 is stable. Once 2.1 is stable, no new development will be done on the 2.0 version.

I'm on 2.1, how can I use this mod?

Download and enable the latest 1.X.Y version of this mod!

How do I get to the underground caverns?

Research the appropriate tunnelling drill equipment technology for the planet you are on, then craft a tunnelling drill equipment and put it in your armor's inventory grid. Then press control+enter (by default) and you will tunnel to the underground caverns!