Hiding Switch Engine Button
You can hide the Search Engine Button in the Address Bar.
From Lunascape Settings
- Go to  Lunascape Settings (OR from Menu Bar: Tool > Lunascape Settings) Lunascape Settings (OR from Menu Bar: Tool > Lunascape Settings)
- Select Tool bar > Address Bar in the settings tree on the left side of the Lunascape settings window.
- In the "Change Engine Button" frame on the right select "hide"
 ※ it is set to "Image and Text" by default 
- Click "OK" to save changes