I see what happened - on Github release ver. 0.12.2.1 of the wallet for Win32, 64 and Arm/Linux has been removed. I suspect there was a bug.
Now, it'd be nice if the dev team provides a comment and explains what really happened. People, including myself, lost a lot of $ today.
Where did you find 0.12.2.1? I only can see 0.12.1.7 at
https://github.com/vivocoin/vivo/releases