Basic hacking info?

So i am trying to edit an existing .swf hacked client/ create a new one.

All i really want to do is get rid of ALL visual notations of hack use (including "connecting to realm, Rotmg 12.4.3- made with Orape 3.0") so i can keep just auto-nexus and a few anti-debuffs running while i still record rotmg videos.

I don't know where to start, i figured i'd just have to download a swf viewer/editor, look at the code, delete the stuff i don't want, then recreate it as a new swf. Or maybe copy code from existing swf, then paste on a blank one except for the parts i don't want. I am tech-savy but i know close to nothing about programming/coding, so i need a significant amount of help if there's some sort of step-by-step. If I'm looking at a huge cube of work and just seeing the flat square, im not interested in doing this, I want to know a quick how-to so i can do it to all the hacked clients i download whenever a new build is released, if that doesn't exist then forget it.

How do i go about doing this? All/Any help is appreciated, thanks.