I’ve been using WinSCP for years and today it seems like I can’t log into Yahoo and GoDaddy servers. I found out that GoDaddy & Yahoo have updated their servers that makes WinSCP V4.2.2 not compatible with those servers any more due to some special encryption type. I went to their website and downloaded the latest client, now I can be able to log in to those servers. Just click on Help menu and check your client version if you can’t log in to remote server. I’d recommend to those who are still using WinSCP and all of the sudden it doesn’t work, just go get the latest version and everything will work as normal.