As Cosmowe says, it is of course a possibility that people are using the demo to see if Resolume suits their needs. We try to help these people as best we can, even if they decide to not purchase it later on. We're crazy like that
Having cracked versions is unfortunately always a side-effect of making a popular software. I think there are very, very few people that can honestly say they've never in their life used illegal software. Luckily the VJ community mostly consists of awesome people who pay for their tools when they start earning some money.
What really amazes me is how people that share cracked or illegal versions (whether it's software, films, music or whatever) are thanked and complimented for it by other people. I mean, all you did was make minor changes to something that someone else made, and you uploaded it. Where is the big achievement in that?