I don’t know which (if any) files were overridden when I upgraded.
Output of ls -la /var/lib/plexmediaserver:
drwxr-xr-x 4 myuser myuser 4096 Feb 4 17:34 .
drwxr-xr-x 52 root root 4096 Feb 17 11:30 ..
drwxr-xr-x 3 myuser myuser 4096 Feb 4 17:34 Library
drwxr-xr-x 2 myuser myuser 4096 Feb 5 18:03 tmp_transcoding
/usr/lib/plexmediaserver/lib/plexmediaserver.service:
User=myuser
Group=myuser
