Don't worry about posting on this forum - I've found most everyone to be especially kind and generous. Occasionally someone will "sound" a bit short (I'm guilty of this) and it's usually because they're typing a quick response to try to help as fast as possible. When I catch myself doing this...
It's my understanding that the younger the bird, the better chance it has of growing its beak back. Really young..like less than a couple of months. Other than that - I don't know....