Asked a few times in various places:
If I am a Flex Builder 3 Professional User, is there a way to upgrade and still get ColdFusion Builder, since ColdFusion Builder comes with a copy of Flash Builder?
If you are a Flex Builder 3 Professional User, you can upgrade to Flash Builder Premium for $299. Flash Builder Premium has a few key features above and beyond Flash Builder, including Network Monitor, profiling tools, and unit testing support. We made a handy upgrade chart for you.