Evaluating plugin compatibility and functionality on membership

I'm currently working on a website that will require the use of a member management plugin that integrates well with Buddypress. The first phase of the project will not involve development in this area, but I would like to evaluate plugins before we reach that point.

I have purchased a membership plan already and installed the membership pro plugin. Will I still have access to the plugin if I cancel my membership? In other words, will I still be able to evaluate the FULL functionality, rather than the free version of the plugin if I cancel the membership?

I intend to reinstate the wpmu membership as long as the plugin meets our needs.