Mac Licence question

[jack]

So I bought the PC Licence of Paintstorm when it first came out on my mac and ran it on bootcamp- worked perfectly and still does.
I've now downloaded Paintstorm, Mac version- running on the same computer but I can't access it because it say's I need a MAC Licence.
Im not sure if it's a stupid question but do I have to buy another licence to run it on my Mac, even though I'm still running it on the same computer?

[support]

You need to deactivate current Hardware id in personal area www.paintstormstudio.com/login.php After that you can register Paintstorm from any PC with any OS again.
Read more:paintstormstudio.com/registerfaq.html
If you don't have password You can get it at the bottom of LOGIN page by "Forgot your password/First time login" link