I use the code from the example

var appControl = new tizen.ApplicationControl(
     "http://tizen.org/appcontrol/operation/pick",
     null,
     "image/jpeg",
     null);

 var appControlReplyCallback = {
     // callee sent a reply
     onsuccess: function(data) {
         for (var i = 0; i < data.length; i++) {
             if (data[i].key == "http://tizen.org/appcontrol/data/selected") {
                 console.log('Selected image is ' + data[i].value[0]);
             }
         }
     },
     // callee returned failure
     onfailure: function() {
         console.log('The launch application control failed');
     }
 }

 tizen.application.launchAppControl(
     appControl,
     null,
     function() {console.log("launch application control succeed"); },
     function(e) {console.log("launch application control failed. reason: " + e.message); },
     appControlReplyCallback );

Myfiles open and I can select a image, but I never return back to may app after selecting….