The Membership Plugin does not appear in the WMPU hub. From time to time, I see a message from membership 2 asking if I want to update to the new version. I have not done so yet because of the transfer to my dashboard, so I have been saying "ask in a few days." If I try to install the update from WPMU, it fails, saying Destination Folder Exists, with an option to install manually. Checking the KB, I see others having the same problem with the solution being to give you access to the site. It would be far more helpful if there were steps to fix this problem, or if the upgrade actually appeared with the plugin on the site.