Well, if you have a save that says "Corrupted Kingdoms v0.21.8" (or anything less than 21.8, really) underneath it, you can click the SubscribeStar link at the top of this page and scroll down to "PUBLIC RELEASE - v0.21.8 - LET'S ROCK!" to find the download link.
However, if your saves all say "Corrupted Kingdoms v0.21.9" underneath, you'll need to wait for v0.22.0 to go public, and hope it fixed combat. It should be going public soon -- it's already out for subscribers. Alternatively, you can do as above and speed through the game again from the start in v0.21.8.