Factory reset

Feel free to give points to the first responder, I'm just adding my comment as a side note:

Whether or not you need to restore the original contents of those directories should be determined by the reason you've chose to reset your game to defaults.

-  If the problem you've experienced was the result of neighborhood data corruption then you'll experience the same problem(s) after restoring the contents of those directories. In that case, the best solution is to export all neighborhood items to your gallery before 'resetting' your installation to defaults then import all items into your new file.

-  If the problem was the result of game package corruption or failure of the Origin application then restoring all of your save data by transferring the "Electronic Arts\The Sims 4" directory back to it's original location is the best solution.

-  If the problem was the result of cache corruption the best solution is to restore only your current save and allow the game to rebuild all cache files.

-  If the problem was the result of save corruption or mod-related malfunctions then you'll need to restore the previous good save. If your current save is Slot_00000008.save then your previous good save will be Slot_00000008.ver0. If ver0 contains the same errors then you can roll further back by restoring ver1, ver2, ver3, etc.

-  There is no reason to restore Slot_00000001 since this is generated by the game as a temp file during editing and will be rebuilt upon loading of your neighborhood from your current save.

When restoring saves, ensure that the slot number matches. If you're creating a new file and your current slot number is Slot_00000002.save then you must rename Slot_00000008.save from your original save directory to slot_00000002.save for the data to be loaded. There is no reason to delete, edit, or even open any of the other files under "My Documents\Electronic Arts\The Sims 4"