Updates check fail because winscp.net certificate cannot be validated

Hi,
I have exactly the same issue as in this topic: https://winscp.net/forum/viewtopic.php?t=33561
I am on 6.5.3.
Is it possible that this issue is back ?
Connections to servers via SFTP work fine, only the update fails
Certificate not trusted. Error: 800B0109 (A certificate chain processed, but terminated in a root certificate ...