Do you mean that previously, when opening a site, it opened automatically; while now you are prompted with a password? You probably had password stored in WinSCP site and it stopped working. It has either changed or expired or your account was suspended, etc. In either case, you should contact your server administrator.

Hi,
When I was trying to enter Winscp, ıt requires a password . How can I get a password as we never used a password before.
Thanks,