[2021] New update IS compatible with pre-update campaign!

Hi! In principle, we always try to make updates as backwards compatible as possible. However, when there are big changes, it's possible they won't be applied to existing campaigns, and trying to run a very old save, perhaps dating back a few versions instead of just one, there is a real risk that it won't work quite as well as it should. We think it's important to give players the chance to continue their campaigns even though we are in early access, but as the game is constantly changing, we can't guarantee 100% compatibility at all times. In this case, happy to hear your old campaign is working mostly okay with the new update, and I hope you're enjoying the new content!