wrote:
I guess I'm not getting it because I don't see how to add a new club nor a new aircraft type either.

Why don't you ask?

To add a new aircraft, write a ticket in the XCSoar bug tracker
(http://bugs.xcsoar.org/newticket).

To add a new club, click on "Change Club" in your settings, and below
you'll see a form titled "Register Club".