I used to have it with licence, but now is expired, I actually searching for a free alternative (or cheaper) to draw. I heard that GIMP is a good alternative but I still need to try it.
I suggest Krita, which is my only painting too now. You can find more information: www.krita.org Krita is designed for digital painters, while GIMP is not.
Ah yes, you were supporting them a lot lately, I don't know how I forgot about that one. I read that they want to release it on steam greenlight, that whould be pretty good! Thank you for your suggestion. ^^