Plex is not working properly in Ubuntu 15.04 and now I can't even remove it

To remove the plex error I followed this article Fix annoying "The package needs to be reinstalled but I can't find an archive for it" error in Linux Mint and Ubuntu.

sudo rm -f /etc/init.d/plexmediaserver &&
sudo dpkg --purge --force-all plexmediaserver
sudo apt-get purge plexmediaserver
sudo rm -rf /var/lib/plexmediaserver
sudo userdel plex
sudo rm /etc/init/plexmediaserver.conf
sudo rm /etc/default/plexmediaserver

After all the above steps I downloaded plex from Software Center. that vertion is so old. I then upgraded to this version:
plexmediaserver_0.9.11.7.803-87d0708_amd64
And this version is kind of working okay.

And now everything is working perfectly for me.