FunctionFlip bugs me

It's fantastic piece of software that beautifully patches Apple's usability stubborn oversight.
No doubt extremely useful, a must.

The problem I have with it - while it does it's job - it sounds an alert whenever I press the keys that I've flipped.
(I've flipped only F9 & F10 on SR'MBP of late'07 / 10.5.6)

Sometimes I just don't care, sometimes I'm annoyed to death.
I've contacted developer sometime ago actually with no reply at all.

So, I wonder if anyone here [who uses it] had run into this issue at all?

P.S. Yes all is up to date

 

I can't unfortunately stop using it, as it's still indispensable for me as it is.

Having to press Fn+ all the time I reach for Expose/Adjust Volume&Brightness. and most of all having to figure out what I have to press every time - is much bigger hassle ...

Still, I'd love this great thing to be fixed, it's close to perfect right now, except this bug (compatibility I believe?)