The Open Framed by Mapper command is a different way to open data. You would use Open Framed by Mapper when you already have a Map window open and you are unsure as to the states that it covers.
When you click Open Framed by Mapper, the Autoloader queries the current Map window for the bounds or extent that the window covers (that is to say, the maximum and minimum longitude and latitude). The Autoloader then queries your data catalog to see if you have any street data installed that covers this area. If you do have one or more states that would cover the map window, the Autoloader displays the standard dialog boxes that let you pick one or all of those States (and one more of the StreetPro layers) and adds them to the current map window.