Marketpress does not appear either on my site or in the mpwu dashboard. How can that be?

I have pinned the dashboard as the subject for this question as the Marketpress does not appear as an option. It appears in my instaled plugin list and also in the menu. i have edited the settings and added two products for testing. But it does not appear anywhere?? I am obvilously doing something wrong, but could someone please tell me what.
Kind regards