I think it was mentioned that it's something they're investigating, although I had the impression they were talking more about a data export function rather than complete desktop software.
The way it currently works: you connect your Uemis SDA to your computer, with USB. The computer sees the SDA as an USB device. On this USB device, you start a HTML file (a web page, essentially), which fires up your browser. The browser allows you to upload the data from the SDA to the myUemis website. The brilliant part of this is that this will work on any modern operating system, which of course includes Windows, Linux and MacOS. MyUemis itself has the same options as the SDA build-in logbook, and the data is synchronized in both directions. Changes on one get updated on the other, too. MyUemis is essentially just a bigger and prettier version of the SDA log.
Boring technical guesswork: I'm guessing the easiest way for Uemis to get the raw data out of the SDA is by having the build in webpage export the data in XML or somesuch format. This file could then be opened by pretty much any 3rd party program that knows how to deal with it, or similarly, just provide such an export file by default on the USB. I'm not sure they want to entangle themselves in the mess of making and maintaining software, which would be limited on which systems it runs on, too.