**This process takes place after using mcloum's omv.sh script**
I didn't want to post until it was repeatable. Not sure if anyone still needs it, but here is what I have been doing.
wget <plexpass download url>
(I use the Ubuntu 64bit link)
dpkg -i plexmediaserver_######_amd64.deb
(whichever version you are downloading)
You get warning that previous version was created by a script default= N
enter Y
cd /etc/init.d
ls
verify plexmediaserver.dpkg-bak exists
rm plexmediaserver
(This removes a symbolic link)
mv plexmediaserver.dpkg-bak plexmediaserver
## I rebooted here ##
update-rc.d plexmediaserver defaults