Index: Core/Common/src/Core.Common.Gui/Settings/ISettingsHelper.cs
===================================================================
diff -u -rd74518566abeb501ea88b25f3111f9749853c5ed -r1c29823d3914c54b0b85d4787a80b68be804f523
--- Core/Common/src/Core.Common.Gui/Settings/ISettingsHelper.cs	(.../ISettingsHelper.cs)	(revision d74518566abeb501ea88b25f3111f9749853c5ed)
+++ Core/Common/src/Core.Common.Gui/Settings/ISettingsHelper.cs	(.../ISettingsHelper.cs)	(revision 1c29823d3914c54b0b85d4787a80b68be804f523)
@@ -41,9 +41,9 @@
         /// <summary>
         /// Gets the application local user settings directory.
         /// </summary>
-        /// <param name="postfix">The postfix path to use after the local application data folder (if any).</param>
+        /// <param name="subPath">The sub path to use after the local application data folder (if any).</param>
         /// <returns>Directory path where the user settings can be found.</returns>
         /// <exception cref="IOException">Thrown when the application local user settings directory could not be created.</exception>
-        string GetApplicationLocalUserSettingsDirectory(string postfix);
+        string GetApplicationLocalUserSettingsDirectory(params string[] subPath);
     }
 }
\ No newline at end of file
Index: Core/Common/src/Core.Common.Gui/Settings/SettingsHelper.cs
===================================================================
diff -u -rf3e15928caffd4336c97f5fa3de495a5a05bf6b8 -r1c29823d3914c54b0b85d4787a80b68be804f523
--- Core/Common/src/Core.Common.Gui/Settings/SettingsHelper.cs	(.../SettingsHelper.cs)	(revision f3e15928caffd4336c97f5fa3de495a5a05bf6b8)
+++ Core/Common/src/Core.Common.Gui/Settings/SettingsHelper.cs	(.../SettingsHelper.cs)	(revision 1c29823d3914c54b0b85d4787a80b68be804f523)
@@ -20,8 +20,10 @@
 // All rights reserved.
 
 using System;
+using System.Collections.Generic;
 using System.Globalization;
 using System.IO;
+using System.Linq;
 using Core.Common.Gui.Properties;
 using Core.Common.Utils.Reflection;
 
@@ -64,23 +66,33 @@
         /// <summary>
         /// Gets the name of the application.
         /// </summary>
-        public string ApplicationName { get; private set; }
+        public string ApplicationName { get; }
 
         /// <summary>
         /// Gets the version of the application.
         /// </summary>
-        public string ApplicationVersion { get; private set; }
+        public string ApplicationVersion { get; }
 
         /// <summary>
         /// Gets the application local user settings directory.
         /// </summary>
-        /// <param name="postfix">The postfix path to use after the local application data folder (if any).</param>
+        /// <param name="subPath">The postfix path to use after the local application data folder (if any).</param>
         /// <returns>Directory path where the user settings can be found.</returns>
         /// <exception cref="IOException">Thrown when the application local user settings directory could not be created.</exception>
-        public string GetApplicationLocalUserSettingsDirectory(string postfix)
+        public string GetApplicationLocalUserSettingsDirectory(params string[] subPath)
         {
-            var appSettingsDirectoryPath = string.IsNullOrWhiteSpace(postfix) ? localSettingsDirectoryPath : Path.Combine(localSettingsDirectoryPath, postfix);
+            var directorypath = new List<string>
+            {
+                localSettingsDirectoryPath
+            };
 
+            if (subPath != null)
+            {
+                directorypath.AddRange(subPath.ToList());
+            }
+
+            string appSettingsDirectoryPath = Path.Combine(directorypath.ToArray());
+
             if (Directory.Exists(appSettingsDirectoryPath))
             {
                 return appSettingsDirectoryPath;
Index: Core/Common/test/Core.Common.Gui.Test/Settings/SettingsHelperTest.cs
===================================================================
diff -u -rf3e15928caffd4336c97f5fa3de495a5a05bf6b8 -r1c29823d3914c54b0b85d4787a80b68be804f523
--- Core/Common/test/Core.Common.Gui.Test/Settings/SettingsHelperTest.cs	(.../SettingsHelperTest.cs)	(revision f3e15928caffd4336c97f5fa3de495a5a05bf6b8)
+++ Core/Common/test/Core.Common.Gui.Test/Settings/SettingsHelperTest.cs	(.../SettingsHelperTest.cs)	(revision 1c29823d3914c54b0b85d4787a80b68be804f523)
@@ -42,6 +42,7 @@
             // Assert
             Assert.AreSame(expected, actual);
         }
+
         [Test]
         public void ApplicationName_ReturnsProductNameOfExecutingAssembly()
         {
@@ -63,21 +64,36 @@
         }
 
         [Test]
-        [TestCase(null)]
-        [TestCase("")]
-        [TestCase(" ")]
-        [TestCase("some directory name")]
-        public void GetApplicationLocalUserSettingsDirectory_VariousPostfixes_ReturnsApplicationLocalUserSettingsDirectory(string postfix)
+        public void GetApplicationLocalUserSettingsDirectory_WithoutSubFolder_ReturnsApplicationLocalUserSettingsDirectory()
         {
-            // Setup
+            // Call
+            var pathFromSettings = SettingsHelper.Instance.GetApplicationLocalUserSettingsDirectory();
+
+            // Assert
             var localSettingsDirectoryPath = Environment.GetFolderPath(Environment.SpecialFolder.LocalApplicationData);
-            var appSettingsDirectoryPath = string.IsNullOrWhiteSpace(postfix) ? localSettingsDirectoryPath : Path.Combine(localSettingsDirectoryPath, postfix);
+            Assert.AreEqual(localSettingsDirectoryPath, pathFromSettings);
+        }
 
+        [Test]
+        public void GetApplicationLocalUserSettingsDirectoryWithExpectedDirectory_WithPostfix_ReturnsRootFolderWithPostfix()
+        {
+            // Setup
+            string subFolder = Path.GetRandomFileName();
+            string subSubFolder = Path.GetRandomFileName();
+
             // Call
-            var pathFromSettings = SettingsHelper.Instance.GetApplicationLocalUserSettingsDirectory(postfix);
+            string directory = SettingsHelper.Instance.GetApplicationLocalUserSettingsDirectory(subFolder, subSubFolder);
 
             // Assert
-            Assert.AreEqual(appSettingsDirectoryPath, pathFromSettings);
+            string userSettingsDirectory = Environment.GetFolderPath(Environment.SpecialFolder.LocalApplicationData);
+
+            string testDataPath = Path.Combine(userSettingsDirectory, subFolder, subSubFolder);
+            Assert.AreEqual(testDataPath, directory);
+
+            string testDataPathParent = Path.Combine(userSettingsDirectory, subFolder);
+            Assert.IsTrue(Directory.Exists(testDataPathParent));
+            Assert.IsTrue(Directory.Exists(testDataPath));
+            Directory.Delete(testDataPathParent, true);
         }
 
         [Test]
Index: Core/Common/test/Core.Common.Gui.TestUtil.Test/Settings/TestSettingsHelperTest.cs
===================================================================
diff -u -rf3e15928caffd4336c97f5fa3de495a5a05bf6b8 -r1c29823d3914c54b0b85d4787a80b68be804f523
--- Core/Common/test/Core.Common.Gui.TestUtil.Test/Settings/TestSettingsHelperTest.cs	(.../TestSettingsHelperTest.cs)	(revision f3e15928caffd4336c97f5fa3de495a5a05bf6b8)
+++ Core/Common/test/Core.Common.Gui.TestUtil.Test/Settings/TestSettingsHelperTest.cs	(.../TestSettingsHelperTest.cs)	(revision 1c29823d3914c54b0b85d4787a80b68be804f523)
@@ -94,21 +94,25 @@
         public void GetApplicationLocalUserSettingsDirectoryWithExpectedDirectory_WithPostfix_ReturnsRootFolderWithPostfix()
         {
             // Setup
-            string postfix = Path.GetRandomFileName();
+            string subFolder = Path.GetRandomFileName();
+            string subSubFolder = Path.GetRandomFileName();
             const string userSettingsDirectory = "someFolder";
             var settingsHelper = new TestSettingsHelper
             {
                 ExpectedApplicationLocalUserSettingsDirectory = userSettingsDirectory
             };
 
             // Call
-            string directory = settingsHelper.GetApplicationLocalUserSettingsDirectory(postfix);
+            string directory = settingsHelper.GetApplicationLocalUserSettingsDirectory(subFolder, subSubFolder);
 
             // Assert
-            string testDataPath = Path.Combine(userSettingsDirectory, postfix);
+            string testDataPath = Path.Combine(userSettingsDirectory, subFolder, subSubFolder);
             Assert.AreEqual(testDataPath, directory);
+
+            string testDataPathParent = Path.Combine(userSettingsDirectory, subFolder);
+            Assert.IsTrue(Directory.Exists(testDataPathParent));
             Assert.IsTrue(Directory.Exists(testDataPath));
-            Directory.Delete(testDataPath);
+            Directory.Delete(testDataPathParent, true);
         }
 
         [Test]
Index: Core/Common/test/Core.Common.Gui.TestUtil/Settings/TestSettingsHelper.cs
===================================================================
diff -u -rf3e15928caffd4336c97f5fa3de495a5a05bf6b8 -r1c29823d3914c54b0b85d4787a80b68be804f523
--- Core/Common/test/Core.Common.Gui.TestUtil/Settings/TestSettingsHelper.cs	(.../TestSettingsHelper.cs)	(revision f3e15928caffd4336c97f5fa3de495a5a05bf6b8)
+++ Core/Common/test/Core.Common.Gui.TestUtil/Settings/TestSettingsHelper.cs	(.../TestSettingsHelper.cs)	(revision 1c29823d3914c54b0b85d4787a80b68be804f523)
@@ -20,7 +20,9 @@
 // All rights reserved.
 
 using System;
+using System.Collections.Generic;
 using System.IO;
+using System.Linq;
 using Core.Common.Gui.Settings;
 using Core.Common.TestUtil;
 
@@ -72,12 +74,20 @@
 
         public string ApplicationVersion { get; private set; }
 
-        public string GetApplicationLocalUserSettingsDirectory(string postfix)
+        public string GetApplicationLocalUserSettingsDirectory(params string[] subPath)
         {
-            var settingsDirectoryPath = string.IsNullOrWhiteSpace(postfix)
-                                            ? ExpectedApplicationLocalUserSettingsDirectory
-                                            : Path.Combine(ExpectedApplicationLocalUserSettingsDirectory, postfix);
+            var directorypath = new List<string>
+            {
+                ExpectedApplicationLocalUserSettingsDirectory
+            };
 
+            if (subPath != null)
+            {
+                directorypath.AddRange(subPath.ToList());
+            }
+
+            string settingsDirectoryPath = Path.Combine(directorypath.ToArray());
+
             if (Directory.Exists(settingsDirectoryPath))
             {
                 return settingsDirectoryPath;