There's two more ways to get it free for those that missed out on the previous offer.
Through Practical Photography magazine (valid until 31 Aug 2014):
http://www.dxo.com/intl/practicalphotography
Through Digital Photo magazine (valid until 30 Sep 2014):
http://www.dxo.com/intl/digitalphotouk
Note that "valid until" means when you have to redeem the license by. The actual license is a perpetual one that you can use for as long as you like.
Yes it's an older version but, as already discussed in similar deals repeatedly, it does more than enough for the amateur (and even professional) photographer so still very useful if you don't want to cough up ~$450 for the latest version.
Nice find! Sadly my new Sony camera is not on their support list:
http://www.dxo.com/sites/dump.dxo.com/files/dxoimages/photo/…