Appreciate you reaching out, but there is nothing in this post we can actually use to investigate, correct, or fix.
If willing, please provide specifics. When posting, it is helpful to tell us what you intend to accomplish and what did or did not happen as you expected. Share information about the computer OS version and laser system you are using.
When you say “it ruined all my settings” please be more specific with the details of what changes you are seeing.
You should have the option to restore the LightBurn Preferences. Have you tried this ‘Load
Prefs Backup’ option?
Additionally, @Mooseuk is correct, we just announced the LightBurn 2.0.01 Patch Release.