You’ve been complaining from the start that the devs are not interested in addressing your issues. I’m the lead dev, I’m here offering to help, and now suddenly it’s you who’s uninterested. Go figure.
Again, LightBurn was never intended as a CAD package, and I’d be the first to admit that attempting to use it as such would be frustrating. That aside, if it’s bogging down with simple files I’d like to figure out why.