0) Download Java SE Development Kit 8u301 X64 for windows.
https://www.oracle.com/java/technologies/javase/javase8u211-later-archive-downloads.html
1) Stop ITSS services
2) Delete the jdk folder: Program Files\Quest\IT Security Search\ElasticSearch\jdk
3) The new JDK must be installed to the ElasticSearch\jdk directory for ITSS to find it properly, the correct folder structure for java.exe after installation should be: Program Files\Quest\IT Security Search\ElasticSearch\jdk\bin\java.exe