"Change Membership" link in Membership 2 Pro No Longer Working

Up until recently, when someone clicked "change" on their account page, they were given the option to cancel their current account or upgrade (if available).

Now the link will only take paid members to a page where they can pay again for the same membership they have already paid for.

This happened using an older version of the plugin, but I have updated and saw no change.

Also, I'm anticipating I may need to give you all access using the WPMUDEV dashboard...however that has disappeared from the wordpress admin sidebar (and I also tried updating that, with no luck).