You can find the following four buttons on the upper right of the main interface:

     

• Register: Click to open the program registration window and register the program.
  
  
• Help: Click to open the program Help documentation.
  
  
• About: Click to view the program information.
  
  
  Note: Wondershare 3GP Video Converter allows you to change program interface skin. Click the Change Skin
  
  button to the left of the Minimize button and choose a skin color you prefer.