s2Member v230808 was released on September 8th, 2023.
Unified Changelog for s2Member & s2Member Pro v230808
(Framework) Fix: Potential security issue under rare circumstances. Fixed in this release.
(Framework) Fix: Mailchimp's groups/interests were not transitioning correctly with the updated integration. Fixed in this release.
(Framework) UI: Added a notice about PayPal giving trouble with encrypted buttons recently, recommending to not encrypt them for now. You may need to disable button encryption, and allow non-encrypted payments. s2Member > PayPal Options > Account Details > Button Encryption
(Framework) UI: Brought back the "Expand All" and "Collapse All" buttons for the admin panels. See thread 10796
(Framework) UI: Updated the link to the PayPal IPN configuration.
(Framework) UI: Added link to PayPal's IPN History page. s2Member > PayPal Options > PayPal IPN > More Information
(Pro) Fix: Stripe's billing update pro-form gave an error sometimes. Fixed in this release. See thread 10752
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