This new firmware includes lot of new things, like manual marker mode, support for extended 2.4GHz band from 2350 to 2550Mhz, and also fixes required to properly work in the MacOS client version Dirk-WIllem van Gulik made available here - Please check Release Notes for more info.
Firmware and PC Client are available for free in our download page.
Simple instructions to upgrade firmware are available in this article.