Need help to grab a subtitles in a website

[gaaara]

Hello

sorry if my English is not perfect

i have a ( png ) encrypted files this same files Decrypted gives a .ass files

my question is how can I do to decrypt the png file

protection: aes base64

files with function to Encrypted png Files

http://www.datafilehost.com/d/469dc27d is a swf files with function as3 password = abc123


plezz help tx in advance