How do I re-install an iPhone or iPod touch product?
You can re-install an application you previously purchased through the Apple App Store by deleting it and re-purchasing it using the same iTunes account you originally used to buy the product. To delete the application, hold your finger on the ForeFlight icon until all the icons wiggle. Then press the X button on the ForeFlight icon. Then press the ‘home’ button under the screen to get back to normal mode. You should also delete the application from your iTunes as well by viewing the ‘applications’ section of your ‘library’ and deleting the ForeFlight icon. Now simply purchase the application again from the App Store – it will initially appear that you will be charged again but as the application starts to download you will be notified that your download will be free.