No, StopMotionCreator Pro Editor is an Upgrade for StopMotionCreator Standard Monthly, Yearly and One Time Subscription.
Once you Upgrade your Subscription to StopMotionCreator Pro Editor you can use the PRO features inside your StopMotionCreator as long as you keep renewing your standard Monthly or Yearly Subscription. You will not need to pay any additional fee for the PRO upgrade as long as your StopMotionCreator Monthly, Yearly or One Time Subscription is active.