Hi, i have solved the confusion by accident, i created fatal error code and my wp page displayed error path that made me realized how to enter the right path for this plugin:
/home/mydomain/public_html/mydomain.com/wp-content/images/
I just found out that the path for the first 2 fields must be full path start from home/ followed by root name (i used hostgator) > public_html and so on as see above or as your own folder creation. The developer of this plugin need to explain this in FAQ, this is not simple to most regular wp users.
Thanks for the great plugin BTW.