I try membership free for a few days, Today I decided to buy it, because I think was the element I need in a project.
I proceed to uninstall membership free, and no problem, and then when i install membership premium automatically plugin zone was inaccesible.
I try to delete all wp_m tables and no problem, but now if i don't have the membership free plugin in wp-content I can't access to plugin zone.
Sorry for my bad english. Thanks for all!