If you are looking for the decompiler itself, visit https://github.com/jindrapetrik/jpexs-decompiler
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List of issues#1802 Option to optimize embedded files (jpg,png,mp3) and recompile/recompress back
Author: 
necros2k7
necros2k7Date created:
Type: feature
Visibility: Everybody
Assigned to:
State: new 
Such thing will reduce swf size (lossless recompess resources) and delete junk data
If someone interested I will name tools which do it