What is the project type? In your screenshot it says "Debug an Adobe Flash Player web application". Is your project an Adobe Flash Player web application? You probably can't run a Flash Player web application as an Adobe Illustrator Extension.
What do you want to debug? I am not sure if you can debug flex code while it is running in Illustrator.
The Project Type is Creative Suite Extension project.
I want to Debug it as Adobe Illustrator Extension like the extension which was developed using HTML5,javascipt.
Thank you Friend
Can you still debug your extension that uses html5 in Flash Builder? It seems strange that your screenshot says "Debug an Adobe Flash Player web application" when the project type is Creative Suite Extension.
I said that " extension which was developed using HTML5,javascipt" as an example to Debug As Illustrator Extension.
I Debug HTML5 extension in Eclipse With Extension Builder 3.0 For Illustrator CC 2015.3 and Later Versions.
Now I want to Develop a FlashUI For Illustrator CS6.
I have Installed Flashbuilder 4.6 and Creative Suite Extension Builder 2.0(The Link Provided by You).
I look at Debugging Regarding Debugging.
But My Creative Suite Extension Did not Shows Adobe Illustrator Extension in Debug As Menu as Given below.
please note that the Above Screen shot is Snapped from Debugging Page not in My Flash Builder.
Please give your Suggestion to Solve this Problem.
Thank you Friend,