2026-01-27 – version 5.4.2
* Fix – Missing or wrongly priced Flat Rates.
2026-01-22 – version 5.4.1
* Fix – REST API Unauthorized request retry.
2026-01-21 – version 5.4.0
* Add – USPS First-Class Mail Rates support to REST API.
* Add – “Display Delivery Times” setting to toggle estimated delivery times on shipping rates.