OK! Got it.
I downloaded 13.01 several times to make sure I had a good copy I still kept getting the error File not found.
I attempted to install version 12.08 just to see what would happen.
It bounced through the install and asked for 'disk 2'.
Arghhh!
I decided to wipe anything installed and start from scratch.
In program files I found a Virtual Weather Station Installer folder,hmm, hadn't seen that before.
I opened it and inside was another (?) setup icon and a VWS installer icon.
THINKING maybe this was disk 2 of version 12.08 I clicked the setup icon.
Poof 13.01 was fully installed and accepted my license key.
All is good.