Hi and thank you for your question. My name is ***** ***** I will be happy to assist you.
You should be find without the paperwork. You will need to download a program called Garmin Express. The LM of lifetime maps should be tied to the serial number of your device.
You can download Garmin express by clicking here.
Download, install, and run the program. Connect your device to your computer and turn it on. Then via the Garmin Express program, add the device to the program. Follow the on screen prompts to get your software and map updates. It will let you know if updates are or aren't available at this time.
If you have any questions, please let me know.