To free download a trial version of Naviextras Toolbox, click here To visit developer homepage of Naviextras Toolbox, click here. Naviextras Toolbox is a Windows utility designed to connect your navigation device. Alternatively Naviextras Toolbox also might recognize SD cards that were removed from the navigation device and put into a card reader. Once you connect your navigation device to your PC and launch this tool, it will automatically scan your device for installed software and maps. A free PC-tool called Naviextras Toolbox is available on the Downloads page.