Responsive Pro is a separate theme so settings that are saved on theme basis like logo, custom menu, widgets will need to be reset. No content will be lost.
The theme options will stay just as they were.
If you were using a child theme before then you need to change the header in the style.css. Maker sure to make these changes before activating the Responsive Pro.
There is only place where “responsive” needs to be replaced with “responsivepro”
Here is an example of it would look like
Thats all there is to upgrading to Responsive Pro.