I've been using DWF design review ok for many months, but yesterday I can no longer view dwf drawings by clicking on the file, I have to open the file from within the program. I believe this change has coincided with an update from Microsoft for my computer which is running Windows 7 Professional.
Thank you for your question.
This problem maybe caused by the application compatibility settings. Please refer to my post in another thread by this link.
Please let me know if this can resolve your problem.