The latest isn’t always the best, check the changelogs - Plex Media Server - because if there are no security fixes and the main changes between a working and non-working version are fixes for things you don’t use (e.g. DVR, radio, fixes for nvidia shield etc), then there’s not really any risk in doing it.
Back in context with the rest of this thread though, and I had my port forwarding set-up just fine, it was visible on http://www.canyouseeme.org/ , it seemed to be only PMS that had the trouble with it. The moment I rolled-back to a previous version, with no router config changes, everything worked again.
