MacBook Q: Record a Skype session?

Which application can I use to record a Skype session? I knew how to do this a few years ago but have completely forgotten. I have a MacBook Pro, a little over two years old, with a recent Mavericks upgrade.

Just audio?
Audio Hijack.

Won’t open. Any others? I only really need the audio.

Why won’t it open?

It opened. Initially I got a message that it couldn’t read a character in the file name, but I just opened it. Thanks!