Like I said before:
I'm not a 100% sure myself, but I think if it's in your library, it will count. If you really want to make sure, you can "buy" it for a $0.01Regarding the update download, I'll use butler (the itch software to upload) for the next update, I don't remember which version was the last I uploaded to itch directly, so it might be that you'll have to download (more than) a GB.