After having selected the lens type, this finder window (with the files that you have stored on your computer) will automatically open. Go to the folder where you stored the individual photos (see Step 1) and select those that pertain to the one panorama that you want to achieve (avoid selecting more or missing one). You can only create one panorama at a time, so make sure you select only those photos that pertain to one panorama. Depending on your lens type, this can be between x and y photos.