To add to Tom80H,
Synology imposed significant internal changes to DSM 7.
Those changes required we completely rewrite how Plex runs on DSM 7.
In a nutshell, the following changes were mandated by Synology.
- The package name changed from Plex → PlexMediaServer
- The username changed from
plex
→PlexMediaServer
- The installer no longer had ‘root’ (admin) privileges at any point during the installation meaning I could not do all the work I would normally do for you automatically
To share how much changed, you can start reading here
When finished, FAQ 27 will show you the step by step of upgrading from DSM 6 → DSM 7.