We’ve already pushed out our first post-launch patch for the Galactic Civilizations III alpha, thanks in no small part to the feedback our Elite Founders have been providing in the mere week they’ve had with the game.
We’re extremely pleased with the thoughtful feedback and excellent bug-reporting our Founders have been helping us out with. Thank you!
To download the patch, simply connect to Steam and let the automatic download magic happen. You may have to restart your Steam client.
We haven't found any issues with saved games from previous versions in our internal testing. However, we make no promises as to stability or usefulness of cross-version save games at this point. We will definitely add explicit cross-version compatibility in the future so patch day won't be a worry for in-progress playthroughs.
For full patch notes, please see: http://steamcommunity.com/app/226860/discussions/0/558751813526123242/