Thanks for adding the keyboard UI. Definitely takes the game from good to great.
Do I need to download the new file and sideload it or can the old one update?
You will still have to side load the new file - the system and side load webpage will recognize it as an update to the current game then.
As far as I know there is not yet a way to trigger an automatic update to everyone who has ever downloaded a version of a 3rd party game like this.
Thanks for the comments!