As well as being able to add or remove credits from within your app by using the API's License Credits Modify request and optionally issue a number of free credits to new licenses, you can now also manually add or remove credits for specific License Keys via your Dashboard. Each modification requires a short description that will be displayed to the end-user if your app uses the API's License Credits Transactions request.
Please note that once an in-app credit transaction has been created, it cannot be deleted. However, you can reverse any mistakes by applying an equal, but opposite, transaction.