check the Lavasoft Support forum here
There you can find the newest and some older Updates
Reference Files will be updated ~3 time a week
Homepage : Here
What is Ad-Aware?
that consistently leads the industry in safety, user satisfaction, support and reliability.
With its ability to comprehensively scan your memory, registry, hard,
removable and optical drives for known datamining, aggressive advertising, and tracking components,
Ad-aware will provide the user with the confidence to surf the Internet knowing that their privacy will remain intact. Let Ad-aware protect your privacy.
*Free for non-commercial use only.
To sum all up - Ad-Aware is the best free and shareware spy/malware removing tool.