I'm not exactly sure of what I did because I was doing a lot of different things with HFS but now when ever I start HFS and click Menu -> Uninstall HFS it does the normal thing, asking me if I'm sure and then it opens a command prompt and there is a script there telling HFS to delete itself and then an error comes up saying monoLib error: no reply
Once I click OK the error goes away and HFS finishes uninstalling itself.
I hope I made this clear enough, one thing that I was playing around with was ledufe's HFS service creator (or whatever it's called) there is an article about it in the wiki.
Other than that little error nothing else is wrong.