Squad has officially released version 0.13 of their the fun-filled rocket building sim, Kerbal Space Program. This update addresses performance issues, loading times and also adds a few new features. The release also marks the end of their free-to-play period with updates. Those who pay the sum of 7 dollars will receive free updates from now on and version 0.13 will be left as a full playing demo. You can read the full changelog here and check out the interview we did with Squad in August here.