How to Change Excel Marco upload from FTP to SFTP?

I used the following VBA code in Excel Marco togther with the Script code in Uploading CSV file through FTP server, Workes fine.

Shell "ftp -v -i -s:C:\Script\scriptST1.ftp mydomain.com"

But now the Server changed from FTP to SFTP (secured).

Should i simply change to the following by Adding "S" to" FTP"?
ie.
Shell "Sftp -v -i -s:C:\Script\scriptST1.Sftp mydomain.com"???

Thanks for your help.