JSON Designer funktioniert nicht

It's a recurring monthly subscription, bringing you full access to all code generators for that time.  This subscription brings you access to an extended and growing selection of code generators.  The subscription automatically renews unless auto-renew is turned off at least 24-hours before the end of the current period.  Any unused portion of a free trial period, if offered, will be forfeited when you purchase the subscription.  Optional code generators for backers (saving you lots of time): Obj-C, Swift, Java, Kotlin, JavaScript, Perl, Python, Ruby, PHP.  So help yourself, stop deciphering unreadable example files and use this new simplified visual representation of JSON structures as object oriented models.  The subscription may be managed and auto-renewal may be turned off by going to your Account Settings after purchase.  No cancellation of the current subscription is allowed during active subscription period.  Your account will be charged for renewal within 24-hours prior to the end of the current period, and identify the cost of the renewal.  Code generators are a separate feature, which is connected to a payment, which is a practical way to show if you value the feature and the app itself.  The subscription is allocated as monthly 1. 99$ payment.  Use JSON Designer to jump right into defining your API, without reading a single page of JSON documentation.  Depending on your feedback the app will be extended with further functionality. Enjoy JSON modeling!  Despite the long existence of UML and best practices of software engineering you can't find any diagrams in the API documentations of Google, Facebook, Twitter and the likes.  More that 65% of JSON Designer users say it's a must-have and are using it daily!  It is a design tool primarily, and has always been for free as my part of giving back to the developer community.