I finally finished working on the decompiled HSP source code management tool I mentioned the other day.
It's written in Java, so it should theoretically be able to run on any computer. The JAR file is under Releases. Depending on how you're set up, you might be able to run it by just double-clicking it; otherwise you can run it with the command "java -jar ElonaCustomizer.jar".
I checked to make sure everything worked before posting this, but I'm still an amateur programmer here, so let me know if I made any easily-fixable gaffes.