Codepage error at the update window

On the codepage win1251 for non-utf symbols I'm getting this window when trying to update WinSCP (6.1) without internet. This codepage bug affects all languages. There could be more of them, but I found only one.

Thanks for your report.
What exactly does "the codepage win1251 for non-utf symbols" mean?
I've assumed that you mean the "Language for non-Unicode programs" (see https://winscp.net/eng/docs/faq_utf8#ansi).
But I've tried to set it to "Russian (Russia)", and do not see the problem. I get correct

Host "winscp.net" does not exist.
Could not resolve hostname `winscp.net': No such host is known.

Only after I've responded, I've realized that it's probably about Windows localized messages.
I have added this issue to the tracker:
Issue 2197 – Localized HTTP connection error messages are incorrectly decoded
I'm sending a development version of WinSCP to your email.

Dear Martin, I hope, I understood you correctly, but I didn't receive any nightly build, could you please resend it to me in order to test it?

I've resent the email.

Thanks, it works. You were correct, window is displaying windows system language string.

Thanks for your feedback.