I have the free version of 3CX running at a small non-profit (church) and I recently upgraded from v9 to v11, only to find that it broke several features that I was using. Apparently, Ring Groups are no longer supported in the free version and now people are unable to call the main office because my digital receptionist can longer connect them to the ring group I had created. Does anyone know where I can download v9 install files. Also, should I be able to uninstall v11 and reinstall v9 without any issues? It's really annoying that they removed functionality that was available before in the free version.