Thank you for using Bitnami. We provide the Community edition of the application and we also have this guide to update the solution to a newer version.
I think those steps also work when moving between plans of the application but I suggest you ask for confirmation to the SonarQube developers. Once they confirm that those steps are compatible with the Developer edition, you can go ahead with the migration. In order to recover the installation easily, you can create a backup of the installation directory before starting the process.
Do not hesitate to write us if you have any questions about our solution