Is that the Liberetto-Snes9x modeul that's included as an extra download for Pi3 ARM based computers?
Its worth a try, but I don't know if SNES's has enough computing power to handle it? It has A9 chips and Pi3 has A53 model chips.
Edit...
No... it can't be the same one as the Lr-SNESX module is based on the 1.55 core.
Forgive my unfamiliarity. This world is still new to me. So the core included with Cluster's retroarch package is based on Snes9x v1.55? I don't even know where I could download that for Windows. That aside, that's good news for me and my romhacks, assuming I understood you correctly. I thought v1.53 was the last version to "officially" release from the original dev and that therefore that was all there was.