Thanks for the info! I also received it and have just released a new Desktop and Viewer versions that uses the new login process.
This has to do with the 2FA they introduced as a security improvement in the near past. Any client that connects to Blink account is now assigned to a clientid and must be validated using the email pin verification.
It also explains the emails received last weeks regarding a connection from Amazon servers when using Bling application. It was using the deprecated login process and considered as a not validated client.
As always, manually download Desktop app from releases in case the automatic process fails. If after auto or manual Desktop installation the ui hangs or does not show your data please remove the %userprofile%/documents/Bling.exe/Html/viewer and the %userprofile%/documents/Bling.exe/Download/Versions/Viewer folders and open app again.
Since this is a release that involves both components please take in consideration it may have issues, report them in GitHub.