That's what his blog says, but if you read the Kickstarter project page, it makes no mention of open source. It says that if you donate $2, you get a free copy of the full version. It also says that some of the Kickstarter money will go towards marketing.

None of this sounds like he planned to make it free or open source at all. It sounds like he is trying to capitalize on intellectual property that he doesn't own the rights to.