Hello VeritableShelf,
Welcome to Microsoft Community.
You can replace the entire folder. However, to be on the safe side, it is a good idea to make a backup of the folder you want to replace before you replace it, so that you have a chance to recover it if something goes wrong in the future.
Feel free to let me know if you have any other concerns.
Best regards,
Yuhao Li
Microsoft Community Support Specialist