When you restore,
- Create the Plex shared folder again
- Put the backup copy of metadata (Everything in the Plex shared folder) back in it.
- Now install Plex for DSM 7.
Doing it this way
- It will process all your metadata and make it DSM 7 ready
- It will then move all the metadata into the new DSM 7 structure (PlexMediaServer shared folder)
- When it is complete, the Plex share will be empty
You can monitor the installing (it will sit there for a LONG time) by opening a new session and looking at Migration.log
(appears after 2-3 minutes)
Scroll down to Migration instructions