Membership Plugin Upgrade on Subscriptions Page

On the subscriptions page, is there any way to hide the upgrade options completely? Or is there any way to control what upgrade options appear?

Right now,a member signed up for the top-level sees an upgrade option for a lower level (i.e. a downgrade).

Read previous threads and it appears there is no pro-rate capability for upgrades. Given that and the price of our levels, it's my preference to hide the upgrade options, if possible.