I swear that I am being earnest here but do I need to keep all of the versions of the game on my storage? I've got the past 15 editions and I don't know much about how the whole "updates" thing works.
Oh, sorry for not replying for that long. I don't get notifications for just answers to random threads. No you don't need to keep past versions. On PC you can just replace them. On Android you just start the new .apk file and it should update things. And if you have the itch.io client then it auto updates through there, like it would on steam for example.