We've gone ahead and released v4.4.1 for free. This includes numerous bug fixes. If you want to see more free releases in the future, please leave us a 5-star review on Spigot!
This version does not include native 1.13 or 1.13.1 support, but most features should work. If you're looking for full support, check out MythicMobs Premium to get access to dev builds. v4.5.0 with 1.13 support will be released in the near future.
To get it, just click the Download tab at the top and click to download the latest stable Free version.