@tomigonzo

In first post is writen how you enter in pre boot mode ( where you must add finger on screen ), so first look picture in first post for pre boot.

Now open updater.exe in pack that i send you and add dot beside usb

Now connect device to Pc and add finger in left uper corner of screen OR little abow letter G and you will see in updater window beside USB your device
now click on button OK and whait that procedure is over

When update is finish your nuvi will turn off and back on again and you will have enabled feature on your device.