I don't have a /library/Renpy Path. I think because i use the windows folder. But i managed to delete all data and reinstall it under linux. Now i can Access the auto saves but not my normal ones.
Under Linux the global renpy save folder is located at ~/.renpy inside this folder there is save folder for the game 'AHouseintheRift-1545999373'.
The ~/Library/RenPy is for the location on Mac.