There is only one file type that uses the .WBS extension:
WebBlender Project File
Project created by WebBlender, an interactive, kid-friendly presentation and web site creation program; contains a WebBlender site, which holds features such as pages, images, text, shapes, buttons, and animations; published as .HTML files.
To create the WBS file, select, name the file, choose a save location, and click .
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Updated: March 21, 2014