Moderator: The usual process is to go into the forum area for the product, then create your discussion thread.
Start at this page:
You will see tabs across the top for the most common product areas, or a full list if you scroll down the page:
Then when you are in the area for the right product, click the green Start a Discussion button:
You don’t need to create a new thread now though, this one is now in the appropriate area.