I currently testing different version, but the installation of older version doesn't seems to works well. I tried both ways (direct install with older version and uninstall/reinstall with older version)
The problem is, when I uninstall or reinstall, the directory: var/db/emby-server/plugins is updated (delete or replace with the older version.
But when I restart the server, I can see those log lines:
2019-11-19 14:19:12.095 Info App: File /var/db/emby-server/plugins/Emby.Dlna.dll has version 188.8.131.52
2019-11-19 14:19:12.095 Info App: File /usr/local/lib/emby-server/system/plugins/Emby.Dlna.dll has version 184.108.40.206
2019-11-19 14:19:12.095 Info App: Copying plugin from /usr/local/lib/emby-server/system/plugins/Emby.Dlna.dll to /var/db/emby-server/plugins/Emby.Dlna.dll
So, the "older" is replaced by the latest and boot with latest version... I guess it is "normal" to ensure we used the latest available but in my current testing, I just cannot do this using the plugin catalog. I need to copy the older DLL in the usr/local/...... directory too.
This was just FYI
Thanks, will be back soon with the results