Can you explain a bit more about the problem you are having? I am trying to understand what it is you are trying to do exactly, but I would need a bit more info to be helpful.
What exactly is the problem you are facing? (the more detail here, the better )
I need to create Polygon in Tableau based on this attached data ( This having some file with".shp" and other extension).
So creating polygon based on this data i need to convert , Previously i have used above mention link and successfully created Polygon in tableau.
But now i am not able to convert this data set to tableau readable format to create tableau MAPS.
Alright -- do you know why the above mentioned link stopped working for you, by any chance?
Being a third party tool, its unlikely you'll find direct support for the issue here -- as an alternative, you might want to look at this other 3rd party option, which converts shape files into polygons for use with Tableau. Its a monster thread, but with enough study/diligence, you can certainly figure it out: Grow your own Filled Maps