Thanks, I intend to uninstall it on my old machine before I try to license it.
Nevertheless the product number you used for the first installation may not be valid for another installation (during install the PTC server is contacted to check this) and when you uninstall Prime from your old machine, PTC's server will not take notice of this as its not contacted during uninstallation.
So its very likely that you will need PTC's support to send you a license file for new machine
I guess I'll have to contact support
Good luck! You may need a lot of nerves and patience.
because this website looks and acts like it was written by AT&T...
Maybe the website and Prime are developed under the same management - this would explain why the website looks like it does.