Question: how to convert swf to fla?
Answer: Step1: Open the SWF File that You Want to Convert. Launch Sothink SWF Decompiler. ... 
Step2: Export the snow.swf to a FLA File and View it in Adobe Flash. In the "Resources" panel, click "Export FLA/FLEX". ... 
Step3: Preview the Exported FLA File in Adobe Flash. In Adobe Flash, choose File -> Publish Preview -> HTML.