I have a copy of lubuntu (the "light" distribution of ubuntu) on one of my machines. I received a message that the version that I have is no longer supported and that I must upgrade. When I pressed okay to start upgrading the message box mentioned referenced a newer version of Ubuntu. I was surprised that this did not mention a that there was a new version of Lubuntu. I decided to press okay and see what happens. Nothing happened. The software would not upgrade to either Lubuntu or Ubuntu.
Question: How do I upgrade Lubuntu? Or am I stuck having to reinstall for each new version?