I feel like such an idiot, but I want to be sure I'm getting the latest HTC Sync... I follow the link in the OP and it takes me to support.. I Google and the same thing happens.. They move it over at HTC?
I found it here... http://www.htc.com/us/support/softwa...c-manager.aspx
And this worked flawlessly!! I was always afraid of going back to Windows 8.1 because of ADB/Fastboot being broken.. so far so good!! Side loading soon!!