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Showing developer posts only. Show all posts in this thread.
NO!

You do not want to delete them all, since they contain unistall info for other programs.

Check each folder and open the file called "Setup Configuration settings"

This file will open in word pad and you should see a line that says:
AppName = "name of program"
This will tell you which program that directory contains info on.
Find the one(s) that are for HOI and delete those folders.