All jokes aside however, a license for a software product can say anything it wants to, as long as your read it and agreed to it. However without an installer to make you read it and force you to click "agree" to proceed with installation, enforcement of a license is possibly a legal trouble spot. I believe Renderosity does not use such installers. So unless you have to click an agree to a license button to proceed with a purchase, I don't really see a way for renderosity to prove that a customer ever saw, or agreed to any license. Just including it in an archive doesn't it was ever seen.