To open the import image dialog, click the "Upload Icon", this will open up a upload dialog window. From here images can be either placed into the question, by "drag&drop", only if they are already in the image repository. Most of the time it will require using the "Browse Files" icon. .
When it is clicked on, it will access the users computer and list the directories. Choose the directory that contains the image to be imported. It is possible to select multiple images at once. Hold the "Ctrl" key down and left click on individual image files allow for this.
Once the file(s) is selected, click the "open" key. This will now upload the file to the image repository. Once the file(s) is uploaded, it will show in the repository.