Dan on Re-authorization curse after updgrade from Windows 7 to Windows 10.

I changed my OS from Windows 7 Pro to Windows 10 Pro. No hardware changes, same CPU, Same Motherboard, same everything. I had to re-authorize everything except Superior Drummer. Curious why an OS change/upgrade would trigger re-authorization. I am using Toontrack software on a single computer only
Please reset everything back to one authorization.
Thx!