Great communication with the vendor. I contacted the vendor on Oct. 1 @ 10:41 PM with a small issue and within less than 24 hours I got a response at 3:08 AM on Oct. 2, with clear instructions. And it was very helpful and now my product is working perfectly.
Microsoft Windows 11 Pro | Product Key | Lifetime Use| 1 PC
The upgrade to pro worked. Make sure you read the emails sent. The initial key provided is for a fresh install. You have to reply to the email to get instructions if you are upgrading (vice new install)