Instead of buying updates and extras on the site, you can decide to buy them conveniently in Naviextras Toolbox. Let us show you the process step-by-step in the following section. Download and install updates to your device with Naviextras Toolbox. Enter your credit card data for the purchase.ĥ. Enter and confirm your invoice address.Ĥ. You can purchase items in Naviextras Toolbox by following the steps below.ģ.