Hi everyone. I purchased my copy of KSP through Steam, and I remember reading awhile back that you could download earlier version of KSP. How do I do that with steam? I'm looking for version .20. I was out of town last week when version .21 came out, and when I left I had three active Munar missions I wanted to finished before upgrading to v.21. While I'm excited to play .21 I'd still like to wrap up what I started in .20 first.