BitSenpai

"Scrolls to the bottom and in the empty field enter your platform name exactly as you have it in LaunchBox." This worked for me. You can add your own cores that aren't listed by typing in the empty fields at the very bottom of the list.

For ease of use I would like to not have to remember to press escape x2 every time I want to load a different ROM. I'll use the autohotkey tool inside launchbox to execute e.g. taskkill /f /im retroarch.exe (& other emulators) every time a new rom is loaded if there's no other way.

How do I force LaunchBox to use a single instance of RetroArch? As I'm swapping between games in the LaunchBox library I'm ending up with dozens of RetroArch instances in my Windows 10 Taskbar, each running a different rom.

Great thanks.

On your associated platform list you have additional platforms e.g. the Sega Dreamcast. These platforms are not showing up on my list?

There's an incomplete list of cores in the "Edit Emulator > Associated Platform" tab inside of LaunchBox I have multiple Cores installed in RetroArch that are not showing up in this list inside of LaunchBox. How do I add the cores that are missing?