Recovering the pass

Hi! I forgot my password and I reinstalled the windows. Now I can't get my password back. Hopefully that can be helped.

What password? A password to a remote server that you connect to with WinSCP? You will have to contact your server administrator.
See also https://winscp.net/eng/docs/faq_username

Unless you had the password stored in WinSCP and you have a copy of the old Windows installation data.
https://winscp.net/eng/docs/faq_transfer_config