So I've got all of my systems set up to emulate via Retroarch, and so far the only one still giving me issues is PC Engine CD/TurboGrafx CD. I've got the BIOS files loaded into my Retroarch\system directory and the games load perfectly when I launch them directly from Retroarch, but for some reason when I try to launch those same games via Launchbox, nothing happens -- no window opens, no screen pops up, no error message, nothing. Just a double-click and then nothing else.
I've got the proper core selected as a default in the Retroarch emulator configuration within Launchbox (using the mednafen_pce_fast_libretro core), so I'm not sure what the issue is. And it clearly has to be a problem on the Launchbox side since launching the content via Retroarch is working just fine.
Any ideas on what I might have missed?