Hello Graywolf18, sorry for the inconvenience! The save files are located in this folder:
C:\Users\<your username>\AppData\LocalLow\Bunify Studio\Bunny Hero Works Part-Time
You can manually delete this folder and the save system will recreate them to start working normally.
The newest patch included a big tech leap I had to do as early as possible in development to avoid bigger headaches in the future.
Let me know if that works!