I know this is an old thread but I’m having the same issues. Loving LaunchBox but it’s gonna take a week to import my ROMs. Seriously. It ran all night importing ~2000 ROMs and I am only 1/4 of the way done.
Turning off the fan art helped. I could turn other stuff off but I LIKE that stuff! My internet isn’t the problem either. Gigabit speed.
Any ideas are welcome at this point.