It depends on what you purchased before. The two add-ons being updated are Power and Experience. Premier adds functionality and features exclusive for Subscription members with an active subscription but is not required. If you need both Power and Experience add-ons , I usually advise to get Premier because it is a much better value.
There are two larger add-ons that replaced the bulk of the individual add-ons. The base plugin and All of our current add-ons are compatible with current version 4.7 of WordPress.
See the FAQ Legacy add-ons . Also check versions to see if an update for what you have bought is currently available