I was also having the same problem with the latest version (v3.303) crashing. I'm running Win 7 64bit. I took aniceguy10's advice below and downloaded the older version (v3.302) from AfterDawn, and that one now works flawlessly.
Go to http://www.afterdawn.com/ and in the search bar type "AdwCleaner v3.302". After it down loads, then run it. If it says a new version is available, PRESS CANCEL button. That way it will not remove itself from your folder.
=8-)
