Hi, i'm using an outdated version of osclass with a beta skin. I would like to upgrade from 3.8 to 8.0.2. Is it possible with current classifieds and user accounts? Or is a fresh install required?

Thanks for help and informations

You can update from 3.0 or higher to 8.0.2.
Only manually of course.
Backup everything before, just to be safe.