Hi, > tried to change to the design mode, I got the following message > "The Design Mode is disabled as the project uses an incompatible > version of the Flex SDK". Not unexpected. Sadly design mode is being discontinued by Adobe and will not be a feature in the next version of Flash Builder and Flash Builder has not been donated to Apache. There was some talk that Adobe may donate design view as an eclipse plugin but I've not heard anything more about that.
You might be able to fool Flash Builder that it is still using a 4.6 SDK to get design mode to show. Thanks, Justin