I have an old lightburn software, 0.9.09, it works fine, but I am thinking of upgrading to the latest version to get some of the new features. My question is, will I have to re-instal everything (camera, setting etc.) or will the new version intigrate over the old one?
The license itself remains the same. In the background the validity period for upgrades will simply be extended. That should allow you to upgrade in place to the latest version. If you have any reservation then take a backup of your prefs folder before doing the upgrade.
Probably worth doing so since you’re on a particularly old version.