So I looked on the site, and saw there was a way to downgrade. I need to update the server and cannot afford a pro license at this moment. So I need to downgrade. but the command I saw on the fourm is not in this version of virtualmin…
I asked virtualmin what commands it did have via the help command and it only had change-license.
I believe OP indicated they don’t have the virtualmin downgrade-license subcommand, which means repos would need to be switched manually to the GPL version and then install the webmin-virtual-server GPL version package explicitly.
That would involve editing /etc/apt/sources.list.d/virtualmin.list and changing the paths to include gpl just after the vm/6/ part of the path. (If you don’t have a vm/6 path, it means you have a very old install, and will also need to move to the newer repos.