It was removed in version 4.7
There are no plans to bring it back as of now.
Why was it removed? (How do we work-around?)
I have no idea how to complete the online courses now because the courses I've seen all use design view and I don't know any work-around.
This is very frustrating. (Especially since so many of the online courses for Flash Builder have invalid links. Which already frustrates the learning process and adds wasted hours to my learning.)
For such an expensive product, you would think consistency would be maintained.