I've downloaded ZipGenius and tried to unzip and also got an error. However, when I tried WinZip, PeaZip, and 7Zip, all of them were able to read the files.
But for me, there shouldn't be textual config files at all. These configuration parameters should be reformed to be embedded in the system preferences in some new categories (system - textsanitizer, system - captcha, etc).
I totally agree with you. There is definitely a need to have something like this, but I don't know how easy or difficult it would be. Anybody has any experience with it?