First of all, i would like to express my gratitude to the author of this plugin. A month ago more and less i noticed the membership plugin from wpmudev had the nerve (the nerve!!) to put it self (i mean, the option painel) above the control painel, in the dashboard.
Though, with the Membership plugin from wpmudev, his painel got under the control one, but not to the bottom. Dunno if you could take care of this in a next release. Either way, thanks once again!