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: 22.214.171.124 Last Version: 126.96.36.199
Also the help-page says: "You use version 188.8.131.52 of Membership 2 This is the Free version of Membership 2 - did you check out our PRO version already?"