how do I update it to the newest version?
Viewing post in World of Sex (v0.43 - Wendy's story) comments
For android - Just download new version and during installation it will say "update" (Don't uninstall app as it will delete saves with game as well)
For Desktop and others: Just download the game, extract it and play, game will automatically find and upgrade your saves and let you continue play in the story.
Have a wonderfull day.