On the source machine:
- File > Open prefs folder.
- Close LightBurn
- Copy the prefs.ini file somewhere
On the target machine:
- File > Open prefs folder
- Close LightBurn
- Copy the backed-up prefs.ini file over the existing one
It’s important on the target machine to close the software before you copy over the prefs, as they are written on shutdown (window placement, etc)