Hi, and thanks for a reply!
As long as you are using the same foundational models as everyone else, “support” is not much. A couple of comments in this JetBrains story tracker just about cover what I know about it: https://youtrack.jetbrains.com/issue/JUNIE-1125
I have figured out how to fix what I need to fix in our Rovo installer using a 30-days trial, filled out an open source license form (CA-3929001), got a confirmation email from Maria, so we are probably good to go for the next time something changes.