UltraVNC

I have updated the Server and Viewer on several machines to UltraVNC 1.4.2.0 (16 April 2023).
Since then I've had the problem that the server disconnects when I log off or shut down.
With older server versions it works without problems.
Reconnecting doesn't work properly either.

Ich wollte uvnc2me testen, kann mich aber nicht verbinden. Kann es sein, dass die Server offline sind?

Keiner der folgenden Einträge funktioniert
support1.uvnc.com, support2.uvnc.com, 62.212.66.133, 216.55.178.47, 195.201.195.254, 46.4.8.171

I have checked UltraVNC 1.4.2.0 (16 April 2023) with https://www.virustotal.com:
4 security vendors flagged this file as malicious.

And https://www.heise.de/download/product/ultravnc-38367 flagged the file with possible adware.

Ist there adware or a virus in the download?

Is there a checksum (eg ...