I was about to post that I am having the same problem, but that it does eventually open, about 4 minutes after opening the program. I have experienced this on 2 different computers so far, each with a different set of applications installed before DR. I have tried uninstalling the program, restarting and then installing again. I have downloaded the setup program again and reinstalled. These 2 machines behave the same regardless of what I do. I have successfully installed Design Review using the same setup files on 3 other computers, but that is the limit of my sample. I was hoping to push this out to many more computers, but this is holding up that deployment for now.
Also once DR does open, when I try to open any DWF file it starts to load the file and I can see the preview in the upper left, and a progress bar fills up in the main window, but the drawing will not display and the program hangs. For how long, I do not really know, I stopped counting after 20 minutes.