The install path did change recently from /opt/kibana to /usr/share/kibana. I'm trying to figure out exactly which release it changed in. It looks like it only changed to /usr/share/kibana in 5.0+. Did you try installing a 5.0 build of Kibana at some point?
What OS are you on? Looks like Ubuntu?
Did you download the .deb package and install that directly or did you update your apt repo and use apt-get install kibana?
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