Yes, you saved the correct SWF (3.56MB)
After you decompress it becomes 5.34MB, now you can open in Sothink without corrupted error message.
I already posted this link-

After I read it, I was able to decompress.
And I've already told you a memory dump won't work on this game, so forget about Dynamic unpacking.
This one requires Static unpacking.
Just use this file

if you can't decompress/unpack it.