I think they should keep both names and just have WLBR be the "enterprise" version.
However, in non-English speaking countries, nobody has an issue with GIMP. And even my very religious and Murican MIL uses Gimp. She doesn't even know.
If anything, those discussions further the association, as they come up when you google "gimp program sexual" or sth like that.
It's short for GNU image manipulation program. I mean, you could short it to imp, or rename it to Picture & Image Manipulation Program (PIMP).