Many Thanks, Jason!
I did the restriction by number of downloads.
It works ...
Just a question to the restriction by expiration date:
I understand the 1. and 3. part but have problems with the 2.
At the time of order how/where can I calculate the expiration date?
And how/where do I update the store order details behavior with the calculated exp. date?
I would like to set the expiration date 1 Month or lets say 31 days after the time of order.