Hi
The jump is quite big (2.10 to 2.65), I'm not sure if the update will work without loosing your settings. Copy all your setting (on a sheet of paper or file) just to be on the safe side. In any case, you will not loose any data on the hard drives (unless you choose to do a clean install on a hard drive)
Find or
request your D/L link. Pay a very small fee to have a valid D/L link. D/L and burn the ISO file to a CD. Boot from the CD on the NL machine (or on any other machine but don't forget to plug the USB stick before booting). Choose option
upgrade from the list. Follow the instructions (be sure to choose the good destination drive!) and let the software do its magic

.
Boot from the USB stick. Check settings and see if it worked

Robby