I can not install, the folder that was said to delete does not exist
The cache folder you have to delete (which is located in your %appdata% folder) will only exist if you've already played the game before. This is different from the actual mod folder (which is located wherever you installed the game to). If you just got the game for the first time, you may not have to delete anything.
If you need to delete your cache (that is, if you've already played the game before installing the mod), and you are having trouble locating the %appdata% cache folder, can you post a screenshot of where it is that you're looking?