If you are looking for the decompiler itself, visit https://github.com/jindrapetrik/jpexs-decompiler
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List of issues#2428 Flash 5 / MX Documents Do Not Open
Author: 
e.mily
e.milyDate created:
Type: bug
Visibility: Everybody
Assigned to:
Labels: CharsetFLA exportOld FLA formats
State: upgraded 
> What steps will reproduce the problem?
I loaded a SWF file and exported it in Flash 5 and MX FLA format. I attempted to open the
output FLAs in Macromedia Flash 5, MX, and Adobe CS6.
> What is the expected output? What do you see instead?
Expected for documents to load. They all gave the same error, "Unexpected File Format"
across the three versions of Flash tested. They could not be opened.
> What version of the product are you using? Is it "nightly build"? Which operating system
do you have?
v.22.0.2, installed from DEB package on GitHub.
> Please provide any additional information below. If the problem is related to a SWF
file, attach it here, otherwise we can't help you.
I tried a few files, one is attached in both Flash 5 and MX formats.
Thank you!
VII.8-W_orig.fla (74 KiB)VII.8-W_orig_mx.fla (77 KiB)
Please attach the SWF file you are exporting from.
This should be better in nightly 3038,
try it.
For SWF files with version 5 and lower, it is recommended to set its charset (defaults to
WINDOWS-1252).
You can set it with right click on SWF node / Change charset.
For this file, WINDOWS-1252 is okay, for other files (especially chinese, etc), other
charset setting should be selected.
State: new→upgraded
Works like a charm in nightly 3038! This is great, thanks a bunch :)