Mike, paying customers and open source users are treated exactly the same here - most of the time, we can't even tell whose who, nor do we ever care.
For this one in particular, the answer is yes - 3.2.4 is needed to run HQU. It was released in 3.2.2 I believe, but 3.2.4 is a stability release and is highly recommended. And, the docs should say that.
I hope you do consider enterprise - given your needs and volume of questions, I think you and your organization could benefit greatly from the extra enterprise automation and enterprise support. In the meantime, we'll be here in the forums...
-Stacey