So it seems as if Retropie is having issues with a trademark troll. They have posted some detail on their site and there was a post on /r/emulation at Reddit. One of the Mame folks jumped in and apparently they have had this issue as well, and just this year resolved it. It's a costly process no matter how you spin it. I hope Launchbox is sorted, because these people also seem to have Emulation Station in their portfolio. More detail in the Reddit post. https://www.reddit.com/r/emulation/comments/5vzqh0/retropie_is_looking_for_some_legal_help/
https://retropie.org.uk/2017/02/legal-help-needed/