[Plugin: Styled Facebook Like Box] Widget in more than one sidebar

I’d like to use your FB widget in more than one sidebar, as I use some sidebars in different templates. However, The first time I dragged your widget into one of my sidebars, sure enough it appeared on such sidebar, but the widget disappeared from Available Widgets area, preventing me from using it again o a different sidebar.

Is my request possible? Thanks in advance!

https://www.ads-software.com/extend/plugins/styled-facebook-like-box/