There are new versions of BrightSign firmware and BrightAuthor software available on the Software Downloads page.
Firmware Version 5.1.48 (Beta)
This firmware update is available for all currently supported hardware platforms: 4Kx42, XDx32, XDx30, HDx22, HDx20, LSx22, and AU320.
BrightAuthor Version 18.104.22.168 (Official)
Minimum Player Firmware Required: 5.1.33 (4Kx42, XDx32, XDx30, HDx20, LSx22) / 5.1.16 (HDx22)
This is the new Official version of BrightAuthor. It supports all current hardware platforms.
For a comprehensive list of new features, improvements, and bug fixes, see the release notes located next to the Download Now button (they are also included in the .zip file).