That's what I am doing on both cases and still both don't work.
At this point I really don't know how to fix this 2 issues.
For instance, I noticed on retroarch, when I try to scan a directory (my NeoGeo roms folder) on the right menu option, he founds the games but it doen't create anything at all, but I can play my NeoGeo roms by using Scan file then load archive.
Only NES (nestopia_libretro.dll) and SNES (with bsnes_accuracy_libretro.dll core) was added on RetroArch menus, but no one worked for me on launchbox.
Is that normal?