Awesome news, everyone:
Sprite DLight has just been greenlit by the Steam community! This is what I just saw when checking the current stats (which I did several times a day):
That means the tool will be available on Steam when it is done, and backers of the Lite and Pro versions will receive a Steam key for each license they acquired, in addition to a download link to the final product.
These news are very exciting and I would like to thank everyone who voted and/or helped to spread the word to make it possible.