I may have solved the problem.  Hope this helps someone else. Stop the Digital Delivery service under Windows. Look in C:\ProgramData\Dell\Digital Delivery for the file ClientFulfillmentService.State.settings. Rename this file to something else (I'd prefix it with OLD... perhaps). Start the service. After I did this, a minute to two later when the Dell Digital Delivery interface appeared, it correctly showed both Premiere and Photoshop, and immediately started downloading. Programs installed.  Problem solved.  :emotion-11:
About a month after I took delivery of my XPS 14 Ultabook, Dell Digital Delivery popped up and installed FastAccess Facial Recognition.  Great.  Worked fine. I had been wondering about the Adobe Elements products that were promised as part of the new laptop package but have been too busy to follow up.  I was pleasantly surprised then to see - a day after Facial Recognition installed, that Digital Delivery was now showing Adobe Premiere Elements 10 in the list. However... Premiere has been there for about 2 weeks now, with the Status of "Waiting".   When I look in the DDD Event Log, it shows "Got 2 pending downloads from Dell servers"  - every minute! I've got a d!mn fine internet connection - obviously - I'm on this website.  So it can't be waiting for an internet connection. I have found and run the Dell Digital Delivery Reset Tool, as suggested in other posts on the forum.  The reset tool ran ok, and it can see in its Log file that the 2 pending downloads are Premiere Elements 10 and Photoshop Elements 10. I have restarted my laptop at least twice since running the Reset Tool, and confirmed that the DDD service is running.  (Which I assume is also evidenced by the Event Log updating every minute.) So.... what is it waiting for?  How can I kickstart the downloading and installing process please? DDD version is 2.2.3, if that helps.   
Dell Digital Delivery - pending items / waiting