How to Record Skype Calls?

Skype has now introduced a software named "Evaer" which can be used to record both audio and video calls which are made on Skype. It is a wonderful software which provides wonderful facilities for user.
This software has two versions, FREE and professional. Professional one costs $19.99  and a quality recorded file can be saved in several formats. 
This software can let user to save calls in either MP3 audio or video files.