The personal license is a monthly subscription-based license, priced at $39 per month, and it will be automatically billed each month. If you wish, you can opt for a discounted price and subscribe for one year by making a 12-month upfront payment.
For enterprise online/offline licenses, only annual purchases are available. However, standalone enterprise license supports an additional monthly subscription at $199 per month.
With the annual purchase, there won't be automatic billing, and you will receive an email notification one week before the expiration date. To renew, you will need to proceed with the renewal purchase on the website.