Yes Malc that is one way but it is much more simple to allow the payware to be downloaded like all other payware so you have it on call in a safe location without having to re- download it from N3V, which would also mean having to have a FCT, it also raises the question as to how many times i can download it from N3V before i have to pay more money for a product the i have already paid for.
there should be an option when purchasing to be able to archive it with a product key to install it.
If i have paid for something i want it on file to use at my bec and call, and not having to download it every time.
If you save it with Userdata you might also be installing a lot of assets you don't won't as well