I’m currently still running the latest 3.5 release. Yesterday I noticed an option to upgrade to StartOS 4. After reading the upgrade tutorial, I followed the steps: I stopped/quit the running services as instructed and did the required backup. Then I went back to the Software Update tile, and now it says my service/system is up to date, and the upgrade option to version 4 no longer appears.
How can I make the StartOS 4 upgrade option show up again? What steps should I follow to trigger/restore the upgrade prompt?