Make sure you are logged in using the account you used to purchase iBird. Open the Windows Store. Swipe downward from the top of the screen. A menu will slide down. One of the options will be “Your Apps.” Select it. You will see a list of all of the apps you have purchased. From the pulldown menu in the upper-left corner of the screen make sure select the option “Apps not installed on this PC.” You will see iBird in the list of applications that you have purchased but are not installed. Press the iBird tile to install it.