After downloading the WPMU DEV Dashboard it Plugin Doesn't Show

Hi, I am a newbie so please be patient lol.

I have purchased the WPMU DEV Dashboard, and Market Press which I had previously bought from you does not show up in the installed plugins section. I would like to know if there is a reason for this & can I fix that, as I would like this function to work on all WPMU DEV plugins to see what I have bought from you and what needs updating? I have also noticed that there should be an update for MarketPress showing as I have 2.5.1 and the current version is 2.8.9, how do I update that?

Also if you can help, when turning the must register function on in MarketPress it takes the customers to the Wordpress login page and says at the top 'This function is not working'

Thanks in advance.