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It's no bother! 
And oh you have a new computer? How strange.  No idea why the game is having problem with RAM then, but the thing I know for sure is that your computer can't handle prefetch scripts (The difference between the Steam and itch versions is when the prefect scripts are first used, at the hospital loading screen for itch, at the first battle for steam, exactly where you said your game crashed)  so I removed prefetch scripts from your version.  When I mean slow, I mean that when a big animation appears for the first time, your game might stutter a little bit, but then it'll go back to normal (this will usually only happen the first time you see things like "Space to enter door" or for battle animations.  Beyond that you shouldn't see any difference)