Chris,

No, there is nothing in the Registry. The files in the "C:\ABC6\TEMP_UTIL" folder already exist when you run the setup. Otherwise, the installer would not create the backup files. The uninstall should always bring the system to the previous state. That's why it "rollbacks" the files from the backup folder.

You can go to "General Information" -> "Advanced Settings" -> and disable "Backup Replaced Files". As a result, the installer will not make a backup and the uninstall will remove the files (and not restore them).

Does this help?

Friedrich