Glad you got it working again
And yes, that fight isn't easy at all !!
Making a "separate save game" is not only worth the effort before (or after) a though figth, but also before going in a cave or building, a new area, etc ... (like for example the Temple of Doom!!) !
Good luck & big pleasure with DKS !
(not for me on the moment, I'm making a "stop" for a short time playing games, except the Williams Pinball tables on Xbox

)