It's compatible with 0.7.6 saves.
Need more information, or screenshots.
Should work by just loading your save from the last save slot and then applying the patcher by pressing the "Update to 0.7.7" button at your house.
one of the saves i had was corrupted or something but the other ones worked, thank you, and thank for adding sofia!! was 100% worth the wait
Enjoy! Let me know if you find any issues.
I'll keep adding more of Sofia's renders as the game evolves.