Converting Audible (*.aa) to mp3 without iTunes (user login)

[Remuss]

Hi.

I have downloaded audio book from kickass (TTC-Advanced Investments(Audio)). There are two files inside:

AdvancedInvestmentsPart1_mp332_A261D2IDXHDNU8.aa 87.46 MB
AdvancedInvestmentsPart2_mp332_A261D2IDXHDNU8.aa 87.45 MB

I have tried to convert them into mp3 according several guides which I have found. Problem is that I am not able to play those files (I don't know user login and pass) and all programs which I have tried

Aimersoft DRM Media Converter
Audials
SoundTaxi
NoteBurner

require iTunes and user login. So is there another "dark" app which can crack DRM of Audible audio without user login?

Thank you for any help.