Existing DisplayFusion Pro Standard and Pro Personal Home licenses can now be upgraded to Steam licenses! We'd like to thank everyone who's waited patiently for the ability to get a Steam copy from their existing licenses.
Details on pricing, how to upgrade, and how to install the Steam product code can be found here: http://www.displayfusion.com/Purchase/Steam/
As always, if you have any questions at all, please feel free to let us know!