sftp on windows

I wrote a perl script that uses Net::SFTP to connect to a server and upload
files. This is done on a Windows system that required openSSH to be
installed because the perl script used the 'sftp ' command in the command
prompt to login to the server. I have been told by others that openssh for
windows is not maintained anymore and I should be using copssh. My question
is if copssh can do the same thing as OpenSSH, meaning that at the command
prompt I can enter 'sftp ' and the terminal will connect? This is very
important to my perl script. If it can how can I set it up? I noticed that
there is a sftp.exe in the folder copSSH\bin, who do I make the file run
when I type in 'sftp' from anywhere in the terminal window? Also, can I log
in by typing "sftp [email protected]" in the window cause when I tried
that ( after navigating to copSSH\bin and running the exe) I get the error
'exec: /usr/bin/ssh: No such file or directory'.