People complaining wrong registration key are wrong; they are not following the README.TXT instructions. It doesn't matter that the software REGISTRATION pop-up window asks for an e-mail address. YOU DON'T GIVE ONE. You just put the the words "giveawayoftheday" in its place instead. Then it acknowledges it is the free version for today 10/20/2013 maker is allowing Giveawayoftheday.com to give out today for 24 hours.
If those complainers had just followed the README.TXT instructions, they would not have had any registration problem.