Do you still have the problem? Might have been a temporary issue.
Now, just few hours later, none of the links above report any problem.
Neither were any of our downloads detected by VirusTotal at the time of the release (yesterday afternoon).

WinSCP-6.3.6-Setup.exe - https://www.virustotal.com/gui/file/63e86d50bd3e28b2f19d86114f589ff12c85cebba208e05ece896bcf4dce2aa2
Defender detected 'Trojan:Win32/Wacatac.B!ml' in file 'WinSCP.fi' - https://www.virustotal.com/gui/file/4777791708b494ef9d9cec6b8eebbbba08c60f7f0300f6ced7e6ae4319236f9e
Defender detected 'Trojan:Win32/Wacatac.B!ml' in file 'WinSCP.el' - https://www.virustotal.com/gui/file/ce97bcf415934406112f69aa33fc99dc126ea61fbe034440bbe2fbd873e961d0
Defender detected 'Trojan:Win32/Wacatac.B!ml' in file 'WinSCP.ch' - https://www.virustotal.com/gui/search/31a38961215b556c095ca45c520136a283ebd613
Defender detected 'Trojan:Win32/Wacatac.B!ml' in file 'WinSCP.ms' - https://www.virustotal.com/gui/file/466a75fce527b1a352d14842a2470a0af9d1762a2e1945f95aa2c849e6a17e05

Portable version gets detected as well - Defender detected and removed 'Trojan:Script/Wacatac.B!ml' in file 'WinSCP-6.3.6-Portable.zip' during a web download scan from https://winscp.net/download/files/2024112608479fa47706a7e50e298413fc1ce1946e70/WinSCP-6.3.6-Portable.zip
https://www.virustotal.com/gui/file/064cc4f93eac25fc741e19c8b91d63287ed9d478a6541d3ee035c8fd870d2587/

Yes, same here. Seems to be a language file.
C:\Program Files (x86)\WinSCP\Translations\WinSCP.el
Detected as "Wacatac".

Anybody has the same experience?
Last version of MS Defender detects a trojan, VirusTotal says, the file is clean.