NCH folks do monitor this Forum. From what I can tell, it is on an irregular basis. The volunteers here do share their expertise if they have some to share on an issue that a user is encountering. I am not able to help you at all with clicking sounds and I guess that no one else who has visited and read your thread so far has any idea how to resolve your problem.
You could open a support ticket with NCH and seek their assistance that way. This forum is just mainly about users helping users. Have a great day.
Regards,
-Phil