• What I intended to purchase is Product A, but I was sent a registration e-mail for Product B? 
• I have paid for the program, but why is it still showing as unregistered? 
• How to register QuizCreator? 
• What shall I do if I don't receive the registration code after placing the order? 
• What shall I do if the registration code is invalid? 
• How to upgrade my program and get a new registration code for the free upgrade? 
• How to retrieve the registration code?