firstly close your red hat jboss developer studio then:

  • go to your workspace > metadata > plugins folder
  • delete the folder: org.eclipse.ui.ide.workbench
  • start red hat jboss developer studio again

if not work removing org.eclipse.ui.ide.workbench, remove all folders inside plugins folder, but this will remove all your preferences and color styles.

you can backup some preferences and style files following this:

another tentative is setting your virtual machine manually.

go to home folder of red hat jboss developer studio, open devstudio.ini and add on first line:

c:/program files/java/jre1.8.0_102/bin/javaw.exe

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