Yup, the 3GX firmware downloads as well as all the help you could want are all located at the link below. Sorry for not getting back to you sooner, fell asleep at 0700. But woke up at 1100 and ready to rock and roll again today. More building a new forum, have to cultivate the garden, fertilize, cultivate some more, spray for bugs, back to working on the forum, it's a viscous cycle lol.
The 3GX can be a great gyro, you just have to know how to set it up. There will be trial and error. I HIGHLY suggest you don't get a 500 as your first helicopter and stick with a 450 size. The reason why, most crashes on a 450 are going to run you about $20 + blades. So if you are running Align blades, about $38 a crash. With a 500, a crash is going to set you back about $30 plus blades, so about $60 with Align blades. And you are going to take out the blades in a crash.
The 450 is just cheaper.
I would, if your pockets are deep enough, try to get a beastX or an Ikon gyro. They have beginner modes on them and they are fool proof. Set it up as beginner, and it's rock solid. With the 3GX, you have to tinker with it, and as a new pilot learning EVERYTHING, it can get overwhelming. But, that's not to say it can't be done. It's done all the time on here which is why we are here. All you have to do is ask
Here is the link to the 3GX section with all of my 3GX videos.
Rc-Help - 3GX How-To