I've been replacing the main file of the game with a slightly updated file when I add more to it but AFTER a somewhat big update to the game, I'll add the new game build under the old file so people can check out the old crappy file for morbid curiosity. I'll label the builds Ver1, Ver2, Ver3 etc etc... I was planning to do this with all my other games too, when I get time to add to them after my SuperCutieMarkSisters game.
Take care yall!!!! So if the update is small/changes are small I'll just replace over the current file.