As far as the different versions goes there's a limitation I believe on itch.io as to the file size a person can upload. 0.14 has everything from the beginning of the game up to update 0.14 and 0.19 is everything after 0.14. so if you want the full story start with 0.14 until it tells you to get the next update. Backup your save files then update to the latest version to continue the story.