As of 22/12/2017 this offer is still working. Have used DxO for a number of years, and it is well worth having.
I have the elite version and TBH I rarely use it . You can correct all lens aberrations in ps . But I mainly use the nikon software NX2. I have not been able to get anywhere close with any raw converter as good as NX2 . There are a lot of different settings in elite but the output is not as good as Nikon’s although the aberration corrections are good . None the less for a freebie it’s worth a play . I use the perfectly clear plugin for PS as well that’s pretty good on certain things .
In my case, quite a bit as I didn't have a clue how to deal with the imperfections myself and this tool is really handy..
What have a users skills got to so with a software that corrects a cameras lens imperfections?
Seems like problem with latest MacOSX High Sierra !