The SketchUp logo / watermark remains in the SketchUp files even after deselecting. "Show watermark" in style palette and also after deleting SketchUp watermark from style palette it will not work in style if you don't update the style after editing.
#SketchupWatermarkProblemSolved
#HowToRemoveSketchupWatermarkInSketchup
#howtoremovesketchupwatermarkfromSketchupModels