diff --git a/poetry.lock b/poetry.lock
index 20c32e2..c47c4e5 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -1,4 +1,4 @@
-# This file is automatically @generated by Poetry and should not be changed by hand.
+# This file is automatically @generated by Poetry 1.4.1 and should not be changed by hand.
 
 [[package]]
 name = "anyio"
diff --git a/vanilla_installer/config.py b/vanilla_installer/config.py
index 87f6d6c..4afe65d 100644
--- a/vanilla_installer/config.py
+++ b/vanilla_installer/config.py
@@ -32,8 +32,15 @@ def init():
 
     config = tomlkit.table()
     # maybe call darkdetect from here?
-    # might want to just leave this alone to be
+    # might want to just leave this alone to be honest
     config.add("theme", "dark")
+    config.add(
+        tomlkit.comment(
+            "Whether to use FO's directory or ask the user for a custom one."
+        )
+    )
+    config.add("fo_dir", True)
+    config.add(tomlkit.comment("This is only used is fo_dir (above) is false."))
     config.add("path", mll.utils.get_minecraft_directory())
     if platform.system() == "Windows":
         font = "Inter Regular"
diff --git a/vanilla_installer/gui.py b/vanilla_installer/gui.py
index 0a4e15b..a54c85b 100644
--- a/vanilla_installer/gui.py
+++ b/vanilla_installer/gui.py
@@ -540,6 +540,23 @@ def changeFont(self, state) -> None:
         self.reloadTheme()
         self.parentWindow.reloadTheme()
 
+    def setFODir(self, state: bool) -> None:
+        """Set whether the FO dir should be used.
+
+        Args:
+            state (bool): Whether the FO directory is being enabled or disabled.
+        """
+        if state is True:
+            config.write("fo_dir", True)
+            self.parentWindow.locationSelector.setDisabled(True)
+            self.parentWindow.selectedLocation.setDisabled(True)
+        else:
+            config.write("fo_dir", False)
+            self.parentWindow.locationSelector.setDisabled(False)
+            self.parentWindow.selectedLocation.setDisabled(False)
+        self.reloadTheme()
+        self.parentWindow.reloadTheme()
+
 
 class Worker(QRunnable):
     def __init__(self, fn) -> None:
diff --git a/vanilla_installer/main.py b/vanilla_installer/main.py
index 47e0971..a8af1d3 100644
--- a/vanilla_installer/main.py
+++ b/vanilla_installer/main.py
@@ -14,7 +14,7 @@
 import subprocess
 import zipfile
 from pathlib import Path
-from typing import Optional
+from typing import Optional, Union
 
 import click
 import minecraft_launcher_lib as mll
@@ -22,7 +22,7 @@
 import tomlkit as toml
 
 # Local
-from vanilla_installer import __version__, config, log
+from vanilla_installer import __version__, config
 
 logger = log.setup_logging()
 logger.info("Starting Vanilla Installer")
@@ -152,6 +152,29 @@ def get_version() -> str:
     return __version__
 
 
+def get_fo_dir() -> str:
+    """Get the default directory to use when the independent FO directory is selected.
+
+    Returns:
+        str: The path.
+    """
+    if platform.system() == "Windows":
+        fo_dir_path = (
+            Path("~/AppData/Roaming/Fabulously Optimized").expanduser().resolve()
+        )
+    elif platform.system() == "macOS":
+        fo_dir_path = (
+            Path("~/Library/Application Support/Fabulously Optimized")
+            .expanduser()
+            .resolve()
+        )
+    else:
+        fo_dir_path = Path("~/.local/share/Fabulously Optimized").expanduser().resolve()
+    if fo_dir_path.exists() is False:
+        fo_dir_path.mkdir()
+    return str(fo_dir_path)
+
+
 def text_update(
     text: str, widget=None, mode: str = "info", interface: str = "GUI"
 ) -> None: