bigkid52 0 Posted October 24, 2011 I'm working on a site with Loronix recorders, probably 5-6 years old. The software is 4.5.1 I have what I think is the serial number for each unit written on the back, but when I reinstall the software, it's not a valid number. Is there a prefix or suffix I should be using with the 5 digit number? Thanks Bob Share this post Link to post Share on other sites