This new firmware includes several enhancements such as Auto LCD ON/OFF, as well as compatibility with the new Windows Client GUI
Simple instructions to upgrade firmware are available in this article.
Please check release notes for Windows GUI here. Among other things, the GUI can now display WiFi channels on screen and also run in Tablet PC with reduced screen resolution.
The screen is now resizable to make better use of your screen.
There is also a new "dark mode" skin available for those fans of black screen instrument modes.