I'm not a dev, but according to previous updates, needed save files are stored in disc C, so even if you just delete game folder and then download it, saves will remain on the computer (the same goes for the new versions)
You should be able to keep the data if it overwrites old app during installation. If it doesn't you will need to manually back up the data first from 'Android/data/com.LAGS.haileyadventure/' before uninstalling the old version.
