If you already reinstalled the special edition and still have the same problem you can use the debug menu by pressing f when the game starts up and if you click on edit savefile you can choose a level to load. To go back to where you were before you have to press next 2 times on the level loader and click on TheForest.unity located on the top-left. This will also bypass the passcode part and send you straight into where you were supposed to be after entering the code.