Yes! You can upgrade your account with a PayPal account or any major credit card, and it's really easy.
Once you figure out which upgrade you'd like (Which upgrade should I buy?
), choose the plan you'd like to upgrade to and choose the billing frequency. Once you have selected these choices, choose whether you would like to charge your subscription to a credit card or Paypal.
Choosing Paypal will open a new window for you to log in and connect your account.