We don't send out order confirmation email any more since May 31st, 2011 because it is no longer needed. Your license has been added to your account at http://www.dvdae.com/users/licenses.
Please follow the guide at http://www.dvdae.com/dvdae/tutorial/license to assign machine ID to your license and download the license file to use on your machine. Note that if you are running an old version (5.3.0 or earlier) of DVD Audio Extractor, you'll need to upgrade to 6.0.0 or later to use the license file.