See #1 in my prior post.
Ignore the update notification for now. Wait on 1.30.2 (date tbd) to see if the major problems with 1.30.0/.1 are fixed.
You can subscribe to the Plex Media Server Release Announcement thread to be notified when new releases are available. Scroll to the bottom of the thread and change Normal to Watching.
General Comment #1: Let someone else be the guinea pig. Unless there is a compelling reason to do so, never immediately update to a new PMS release, especially the beta (Plex Pass) releases (you probably do not have beta access since you do not have a Plex Pass).
Most public releases are stable, but every so often something slips through the cracks. A perfect example is the TrueHD transcoding problem with 1.30. It was not in 1.29.2 and was not noticed during the beta release period.
General Comment #2: Keep the old Synology installation files, at lease one or two versions back. That way if you get bit by an unknown bug, you can fall back to the prior release. Plex does not publish older releases on their web site. For example, once 1.30.0 was released, 1.29.2 was removed from the download page.
Yes, it is confusing.
1.21.0-3744 is the version available via Synology. It should never be used. Falling back to 1.21.0-3744 will break your Plex installation.
3744 was a beta release issued when DSM 7 was in beta. It is no longer compatible with current Plex Media Server releases or current versions of DSM 7.
Unfortunately, Synology will not remove it from their system and will not update it to a more current release.
