install dev plugin

"Easily get updates, support, and one-click WPMU DEV plugin/theme installations right from in your dashboard - install the free WPMU DEV Dashboard plugin. (find out more)
"

I want this gone from my admin area. How to do?

To be clear, ive bought a months subscription so i can use the pay per view & membership plugins. I'm building the site for a client, and they will just get confused by advertising.

Also, I probably will not continue my subscription once the site is set up. Can you confirm that the plugins will continue to work? How long are updates available for (1 year?) , or do we have to purchase updates?

Thanks

Will