The latest firmware version v1.09 Beta 05 available includes a number of nice features, and is the upgrade you will need to use the upcoming wideband WSUB3G model for 15 to 2700Mhz coverage.
See a picture of the new Windows Client working with the WSUB3G model in the commercial 88-108MHz FM radio.
(Click on the image for a larger view)
Simple instructions to upgrade firmware are available in this article.
Please check release notes for Windows GUI here.