I took the DPS trial offer, it has now expired so I see the Unauthorized Access - you don't have permission etc. message. I have tried so many times to contact Adobe by various means - no reply - no surprise!!! I am an Adobe Certified DPS Instructor, I need to show/train perspective clients in what is happing in the Adobe DPS world - I can't, but what I can say to them is there is some fantastic alternatives out there, Twixl, Aquafadas, In5, Mag+ etc. These people will talk to you, they will be transparent about everything including costs. I accept that DPS 2015 is only appropriate price-wise for a certain segment of the market and Adobe apparently now have no interest in the other market segments but come on Adobe - talk to us, and let us at least be able to freely trial/test/train your product.
In the words of Pink Floyd "Is there anybody out there?"