[Help Request]Making BYM hack.

As you can see BYM has updated their game so I wanted to make a hack because there isn't any on the forum. (It is not my first time and I know how)
But when I download the game.swf with a download manager (Copy url and put in download manager) and I open it with SWF decompiler (To open .fla with Adobe CS6 after) it says that the file is corrupted and it won't let me do anything with it. Can anyone help me so I can make one and contribute on the forum ? :D

No more hacks for BYM. Game is closing down anyway.

that probably bec. your using the wrong tools.... there were a couple tutorials here before. use the search function. btw you;re posting in the wrong section.