Version 1511 (10586.3) - I upgraded Windows 8.1 Home to Windows 8.1 Pro, then upgraded to Build 10240 RTM. When it was released, I needed to clean install Version 1511 (10586.3) for various reasons. This was accomplished through the Media Creation Tool. When I checked my version, however, Windows 10 Pro had reverted to Windows 10 Home!
Thankfully, TenForums.com has very knowledgeable folks, and those of us who suffered this indignity were helped to get back to Windows 10 Pro. However, this isn't something those out there in the hinterlands are going to be able to solve on their own unless they're very technically minded.
Bottom line: This needs to be corrected before the next major update is released!