Completed
Actually this product is converting only the structure without the content
After complete try to enter the database from phpmyadmin and read the (post) table, still you cannot read the special characters, what this mod did is the same when you open the database and change the charset for all tables manually.
We need to develop something like this:
https://vborg.vbsupport.ru/showthread.php?t=118308
http://www.vcharset.com/
With that mod you will be able to convert the database to UTF-8 and you can read all the special characters from phpmyadmin which means both structure and content has been converted.