diff --git a/SubnauticaWatcherInstaller/Installer.cs b/SubnauticaWatcherInstaller/Installer.cs
index 586fc02..ece1ba4 100644
--- a/SubnauticaWatcherInstaller/Installer.cs
+++ b/SubnauticaWatcherInstaller/Installer.cs
@@ -23,12 +23,13 @@ internal class Installer
         internal Installer(MessageCallback log)
         {
             this.log = log;
+            SubnauticaPath = Path.Combine(SteamPath, @"steamapps\common\Subnautica");
         }
 
         private string SteamPath =>
             Registry.GetValue(@"HKEY_CURRENT_USER\Software\Valve\Steam", "SteamPath", null) as string;
 
-        private string SubnauticaPath => Path.Combine(SteamPath, @"steamapps\common\Subnautica");
+        public string SubnauticaPath { get; set; }
 
         private string SubnauticaManagedPath => Path.Combine(SubnauticaPath, @"Subnautica_Data\Managed");
 
diff --git a/SubnauticaWatcherInstaller/mainForm.cs b/SubnauticaWatcherInstaller/mainForm.cs
index e136d8e..39d810a 100644
--- a/SubnauticaWatcherInstaller/mainForm.cs
+++ b/SubnauticaWatcherInstaller/mainForm.cs
@@ -4,6 +4,7 @@
 
     using System;
     using System.Drawing;
+    using System.IO;
     using System.Reflection;
     using System.Windows.Forms;
     using NLog;
@@ -24,7 +25,27 @@ public MainForm()
             Installer = new Installer(Log);
             
             // Disable buttons if paths invalid
-            if (Installer.ValidatePaths() == 0) return;
+            if (Installer.ValidatePaths() != 0)
+            {
+                if (!Directory.Exists(Installer.SubnauticaPath))
+                {
+                    var dialog = new FolderBrowserDialog
+                    {
+                        RootFolder = Environment.SpecialFolder.MyComputer,
+                        Description = @"Your Subnautica folder is not in the default Steam Library.
+Please select your Subnautica install folder (something like: <steamlibrary>\steamapps\common\Subnautica)
+"
+                    };
+                    var result = dialog.ShowDialog();
+                    if (result == DialogResult.OK)
+                    {
+                        Installer.SubnauticaPath = dialog.SelectedPath;
+                        Log($"User Selected Path: {Installer.SubnauticaPath}");
+                        return;
+                    }
+                    Log("Error: User aborted path selection.");
+                }
+            }
             installButton.Enabled = false;
             uninstallButton.Enabled = false;
         }
diff --git a/appveyor.yml b/appveyor.yml
index 2b31c96..aaa6164 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -1,6 +1,6 @@
 image: Visual Studio 2017
 
-version: '0.6'
+version: '0.7'
 
 install:
   # Node on appveyor is too old
diff --git a/readme.md b/readme.md
index e1c1759..8d900a6 100644
--- a/readme.md
+++ b/readme.md
@@ -28,6 +28,7 @@ This mod is my personal answer to not having an in-game map. I'm making it avail
 * v0.4 - Day / Night indicator
 * v0.5 - Leviathan Spawns now in their own layer.
 * v0.6 - Now able to automatically switch to correct base layer (e.g. Lost River, Lava Zone)
+* v0.7 - Installer now handles cases where Subnautica is not in the default Steam library.
 
 __Caveats:__ Background images and additional overlay data taken from Wiki and may be out-of-date.
 
diff --git a/version.json b/version.json
index 14a4d89..383a12e 100644
--- a/version.json
+++ b/version.json
@@ -1,6 +1,6 @@
 {
   "$schema": "https://raw.githubusercontent.com/AArnott/Nerdbank.GitVersioning/master/src/NerdBank.GitVersioning/version.schema.json",
-  "version": "0.6",
+  "version": "0.7",
   "assemblyVersion": {
       "precision": "build"
   },