Old version
cd Users/xxx/Library/
rm -rf Logs/IntelliJIdea202x.x/
rm -rf Preferences/IntelliJIdea202x.x/
rm -rf Application\ Support/IntelliJIdea202x.x/
rm -rf Caches/IntelliJIdea202x.x
new version
cd Users/xxx/Library/
rm -rf Logs/JetBrains/IntelliJIdea202x.x
rm -rf Preferences/com.jetbrains.intellij.plist
rm -rf Preferences/com.jetbrains.jbr.java.plist
rm -rf Preferences/jetbrains.jetprofile.asset.plist
rm -rf Application\ Support/JetBrains/
After rm -rf Caches/JetBrains
is deleted, you can install the new version