You don’t have to upgrade if you don’t want to.
We support DSM 6 and 7 for now.
If there were ever a DSM 8 then you’d need to upgrade.
As for upgrading from DSM 6 → DSM 7.
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Uninstall PMS
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Upgrade DSM
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Download Plex from Plex.tv/downloads – DO NOT use Package Center (it’s no longer compatible
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This FAQ is a bit dated but “Scenario 2” will be best.
– The Installer will print messages (popup windows) if it doesn’t like anything.
– Follow the instructions given ( refer to this FAQ if needed )
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DO NOT interrupt it when it gets to “Installing”.
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It may take a long time but it won’t get hung/stuck. The time needed will depend on how much metadata you have in the Plex shared folder.
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Sometimes DSM (package center) complains. Ignore it. Instead, open a session and look for
Migration.login the “Plex” shared folder. -
Migration.log will show you which stage of processing it’s at.
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you’ll know when it’s complete after “Cleaning: /volume1/Plex” is done.
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It will print a final message and tell you how to set permissions.
(the username changed from “Plex” → “PlexMediaServer”
Here are the instructions from the popup – expanded out with screenshots.