When RavenNuke™ v2.20.00 was released, we announced that a maintenance release would follow within 2-3 weeks. Not all the documentation was up to date and we knew there would be some minor issues found by our faithful users. There are no major changes to code nor any database schema changes so the upgrade really should be pretty painless assuming you are using v2.20.00. Otherwise you will need to follow the documented upgrade instructions for your version.