Hi there!
Is your OS set to display hidden items? Your LocalLow folder could be hidden due to Window hiding certain system folders and files by default.
Additionally, please make sure you're accessing the correct user's AppData folder (as in the user that's originally installed the game via Steam).
If none of that works for you, please let me know. You could also try following these troubleshooting methods in order to get to your LocalLow folder :)