I'm not sure if WinSCP was ever tested on Windows NT. But WinSCP 5.0.6 was the last version supported on Windows 95, so you may try that.
See https://winscp.net/eng/docs/history?a=5.0.7
Though I definitely do not recommend using any old version of WinSCP.
See https://winscp.net/eng/docs/history?a=5.0.7
Though I definitely do not recommend using any old version of WinSCP.