Where to setup private keys?

I've got a trial version of SmartFTP 4.0 Ultimate and need to know how to set up SFTP over SSH for a server that uses authentication by key. I've connected to this server over Putty and have my public and private keys ready to go... but I can't figure out where to set this information in SmartFTP! Is this a paid-only feature? Or is there a setting that I haven't stumbled onto yet?

Go to the favorite properites. Then in the SSH - Authentication dialog.

Ah, perfect -- thanks!