WebStorm upgrade guide?

I'm using Ubuntu 14.04. I upgraded Webstorm 10.0.3 to 10.0.4 following guide in file:  "Install-Linux-tar.txt" which basicaly is install guide and not upgrade guide. I installed new version to new directory and changed link.

Now I have those links
      ls -hal /opt/
               WebStorm -> WebStorm-141.1550

Path is:
      echo $PATH

webstorm executable is started from:
         which webstorm.sh

However when I start webstorm, it still shows old version 10.0.3

Do somebody know what I missed? Or is there any upgrade guide?
Thanks for help.

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