I was able to view my Design view before, but I think I have done some changes with the SDK. I have set it back to 4.6 but I am unable to see the Design view in mobile projects.
I am able to see it in a regular flex project though.
Any idea on how and what?
It is because may be you've changed your preferences.
Goto Window Menu and select the option - Enable Design Mode
Also go in Preferences dialog - Flash Builder - Editors - Design Mode and check the option
Automatically show design-related views