s2Member v240218 (Framework and Pro) was released on February 18th, 2023.
Unified Changelog for s2Member & s2Member Pro v240218
(Framework) Fix: PayPal button encryption default changed to "disabled".
(Framework) Fix: Mailchimp interest groups integration wasn't working correctly all the time. Fixed in this release.
Upgrading to the Latest Version
You should get a notification about the update in your admin. WP Admin > Plugins
You can also download the zip file from your Account page, and upload it. WP Admin > Plugins > Add New > Upload