I am very new to this so it is likely that I am just making a simple mistake here.
I have Retroarch set as my default genesis emulator. Since I have retroarch and it supports genesis I saw no good reason not to use this..
Retroarch does not have a core for gx plus so I loaded the Pico core. Again I can get the game to load in retroarch using pico, but I can not link through launchbox - when I try nothing happens. I don't load retroarch, I don't get a black screen, the cursor spins for a second like it tried, then nothing.