I'd like to know what this file is called. There are quite a few files in the folder, but there's nothing called a save file or something like that.
I too am searching for the save files. I originally downloaded the game manually and then moved to the ITCH app.
I located the saves for the manually downloaded version here: C:\Users\[YOUR USERNAME HERE]\AppData\LocalLow\AceStudio\SarahsHouse
I am yet to find where the ITCH app version of the game is storing it's saves which is proving painful!