Hi drcoleman48,
Thank you for contributing to the Apple Support Communities.
If an app you purchased from the App Store doesn't work, Apple suggests contacting the app developer for technical help first. If that doesn't resolve the issue, you can contact Mac App Store Customer Support according to Mac App Store: Frequently Asked Questions (FAQ):
What is the Mac App Store refund policy?
If you experience a technical issue with an app, first contact the developer of the app for assistance. Their support contact information can be found on the app's page in the Mac App Store. If that does not resolve the issue, contact Mac App Store Customer Support.
Best Regards.