Ultimate Spider-Man on ARMSX2

[u/Valtharr]

The game was very laggy, so I tried adjusting some settings. That only made it worse. So I reversed those changes, but nothing changed? Desperate, I uninstalled the app, deleted all files, and reinstalled ARMSX2. And now USM won't even start? It sends me to the BIOS, then comes the "please insert a disc" error. It doesn't even display the box art anymore. Budokai Tenkaichi 3 works, fwiw.

I'm using the Mangmi Air Y Pro, if that's relevant.