The Talend Studio requires valid license to start up, the project developed in Talend enterprise studio can not be open in Talend Open Studio, so if you need further modification for bug fixing, you need to re-subscribe.
So, your frustration I understand. Especially how people choose to restrict their apps when subscriptions are expired or not used. However, for its sake it is not pity or greed: it is an App Store symptom that has not been intended to encourage developers to develop a sustainable business model. But don't worry you can handle it through the subscription management system.
