- Open the FLA in an appropriate editor (usually Flash Professional, or other IDEs such as Flash Builder, Flex, etc…)
- Compile (controlenter for Flash Professional)
To clarify:
.swf
is a compiled Flash program (with embedded code, text, and assets)..fla
is a project file that holds the references to everything you want to compile..as
file is the code used in the program..mxml
file is an XML document that contains markup for layout and chunks of code. Usually present with a Flex based project.
A word of warning: a decompiler will not always be successful in reconstructing the project. It is entirely possible that the files you get out of it cannot be recompiled apart from some esoteric settings that the original developer had present.
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solved Convert AS3 to FLA for generating SWF