I have to agree with Dixieland Dancer here. If you had a consultation with a behaviourist, they must have given you a behavior modification protocol - you need to follow it religiously. She is at an age where behaviour modification is very valuable and could improve both your lives immensely. Getting advice over the net from people who have never met your dog with aggression could be dangerous.

My guess is that she/he has recommended putting her on a NILIF protocol and possibly suggested a "Grumpy Growler" class for her (possibly the one you mentioned at the Humane Society). Whatever she/he recommended - please follow it. It will make a huge difference in both your lives.

PS - breeding an aggressive dog is not only irresponsible, it is downright dangerous. Passing on aggressive traits could mean someone somewhere sometime could get hurt as a result.