# linux
rm -rf ~/.config/JetBrains/IntelliJIdea*/eval/*.evaluation.key ~/.config/JetBrains/IntelliJIdea*/options/other.xml ~/.java/.userPrefs/jetbrains/idea
# mac os
rm ~/Library/Application\ Support/JetBrains/IntelliJIdea*/eval/*.evaluation.key ~/Library/Application\ Support/JetBrains/IntelliJIdea*/options/other.xml ~/Library/Preferences/jetbrains.idea.* ~/Library/Preferences/com.apple.java.util.prefs.plist