I tried the free version of Membership 2 and now purchased a pro license in order to use some pro-version-plugins. I downloaded the WPMU DEV Dashboard and as I recall downloaded the plugin and installed it via upload. But the Membership 2 pro plugin still thinks it is non pro. Also says in WPMU DEV / Support:
Installed Version: 220.127.116.11 Last Version: 18.104.22.168
Also the help-page says: "You use version 22.214.171.124 of Membership 2 This is the Free version of Membership 2 - did you check out our PRO version already?"