Well... I have not registered as such so I assume you mean the email used in the bug report. There's nothing there though probably because that's a disposable email addy and perhaps the service doesn't accept big attachments. If you upload the debug version somewhere I'll certainly give it a whirl as I am very keen to have this running under wine.

Thanks for your report.
I have sent you an email with a debug version of WinSCP to the address you have used to register on this forum.

5.17.2 32-bit version. This runs fine under Windows 7.
Starting this same .exe with the same .ini under wine (4.9) produces an invalid access to memory with no stack trace.

I have resorted to using the older 5.15.9 version as it continues to work.

I know how to reproduce the problem or the problem happens frequently enough. I wish to be contacted by the WinSCP team to help resolving the problem.