Be very careful when buying a Corona licence, as they double charged my credit card. I added a licence, decided not to buy. Then I came back later and added again. When it got to the payment stage I noticed there were two licences in my cart, I removed one, and the receipt came through fine for payment for one licence.
Checking my card statement I have been charged twice, and my account now shows two licences. So the moral is, their e-commerce software is suspect so make sure you clear your cookies and start fresh before buying a licence.
Jon