Is Hex-Editor the same thing as Hex-Fiend?

By my research,(probably not accurate ), Hex-Fiend is just Hex-Editor on a Mac.

If they are the same thing then how can you hack using hex-editor?

Is this topic blocked? If so I am sorry, please delete this post.

If there is already a tutorial on this can you please direct me to it, because I could not find this tutorial.

This is what I tried to do: I opened Hex-Editor, and I did File-> Open File-> ultimatewar.swf

This is what I got:
On one page I got a bunch of 8 digit codes - for example: EA0F08CF
on the other side I got some gibberish.

What should I do to hack AS3 games?