I have had Zorin 10 64 bit for over five years it will no longer upgrade Chrome so some things I can no longer get done,can I upgrade to the 15.3 Lite without losing all my information ?
Which information are you looking to preserve?
From Zorin 10 to Zorin 15 is quite a jump; Information such as configuration and app settings would be unlikely to carry over.
Personal files, such as photos, text documents and the like should be preservable. You would want to focus on file formats that have changed little over the time period.