I would like to just express my sincere disappointment with the fact that a Coolbook license will only work with a single Mac. I've had a Rev. A MBA in which I've used Coolbook before, and now that I've sold it (and the current owner don't want to use Coolbook), I can't use it with my new Rev. C MBA. Like a said in an email to Mr. Magnus Lundholm, the Coolbook developer, I would totally understand if he just asked to me to activate it again under a new machine. It would be a dumb limitation like those Windows activations Microsoft impose to their users, but I would be ok with that. But that's ok, the fault is mine. I didn't read the fine print under a .rtf file included inside a dmg file. I didn't notice the footnote on top of the buy now button stating that I should search for that license term. I should be penalized as a consumer who really want to pay to use the software. I know, I know, 10 usd is not that big deal, but it's not about the amount of money. No wonder Apple doesn't support this software. This is really stupid.