Do you have antivirus that may have automatically deleted or safely stored the files? (check it’s history)
Depending on your windows version the save files are stored in your personal windows folder. Also meaning that if you are using a different windows account you may not have access to them.
If you have started the game, but cannot find the saved games. You are still be able to find the folder where they are/should be saved.
You can search your computer for Oachkatzlschwoaf if you cannot find it.