Topic: simple viewer pro

Am trying to up grade to simple viewer pro in Lightroom.  I can't even find the folder with the original simple viewer.  It's not in the web galleries folder but shows up in the list when I launch the lightroom web gallery.  I understand I need to exchange files with the viewer.swf but can not seem to find where to do it.  I tried home-library-app support-adobe lightroom-galleries -Nothing!
Any suggestions?