I'm afraid you can't. Even if you buy StopMotionCreator Pro Editor without the Standard Version, you will not be able to use the software.
Here is why:
1. StopMotionCreator Standard is the main product which is either an Yearly Subscription or Monthly Subscription or one time subscription.
2. StopMotionCreator Pro Editor is an Upgrade or Up-sell which adds the PRO features in your StopMotionCreator software.
3. Since StopMotionCreator Pro Editor is not independent, you will need to subscribe for the main product Speechdio yearly or monthly subscription or one time subscription first. Else you can't use StopMotionCreator with only StopMotionCreator Pro Editor in your account.