According to the developer's Official Patreon Blog , this update primarily introduced the second part of the hangouts for five main characters:
For the .zip file (Windows), saves typically transfer automatically from previous versions, or can be manually moved within the game data folder. Afterlife Harem - v0.3.1 | Patreon Afterlife_Harem_win-0.3.1.zip
Players who already finished the beach episode can access these new scenes directly through the in-game gallery. According to the developer's Official Patreon Blog ,
Official development logs and downloads are hosted on Patreon and itch.io. Afterlife_Harem_win-0.3.1.zip