Jive Forum change root category

Dear Experts

We are using the Forum (Jive Forum) in our Netweaver Portal. The Root category is called 'Forum Home' and the corresponding breadcrumb is: Forums. I should change those two texts but I can't find how.

The root categoy has the categoryID=1. All other categories can be modified in the Administration Panel. How can I access the Settings of the root category and change the titel?

Thanks

Christophe