I use Flash Decompiler Trillix 4.1 which works well including with AS3 games. I get it the library and the innumerable layers are organized that way because it's how Flash compiles them but some .fla's have their size inflated into hundreds of megabytes and some projects can't be saved, for example with RPG Shooter: Starwish I'm getting the conversion error at the end, it's probably encrypted since trying to view the AS crashes it and extracting the scripts got me an empty folder but I still wanted to take a look at it.