Index: DamClients/DamUI/trunk/src/Dam/Tests/StiImporter/SoilProfile2DImporterTest.cs
===================================================================
diff -u -r3071 -r3096
--- DamClients/DamUI/trunk/src/Dam/Tests/StiImporter/SoilProfile2DImporterTest.cs	(.../SoilProfile2DImporterTest.cs)	(revision 3071)
+++ DamClients/DamUI/trunk/src/Dam/Tests/StiImporter/SoilProfile2DImporterTest.cs	(.../SoilProfile2DImporterTest.cs)	(revision 3096)
@@ -78,10 +78,54 @@
         public void Import_WithValidArguments_ReturnsExpectedSoilProfiles()
         {
             // Setup
-            const string profileOneFileName = "SimpleProfile.sti";
-            const string profileTwoFileName = "Tutorial-1a 10.1.4.3.sti";
+            const string profileOneName = "SimpleProfile";
+            const string profileTwoName = "Tutorial-1a 10.1.4.3";
             Segment segment = CreateSegmentWithProfiles(new[]
             {
+                $"{profileOneName}.sti",
+                $"{profileTwoName}.sti"
+            });
+            SoilList availableSoils = CreateSoilList(new[]
+            {
+                "Soft Clay",
+                "Sand",
+                "Peat",
+                "Muck"
+            });
+            
+            // Call
+            IEnumerable<SoilProfile2D> soilProfiles = SoilProfile2DImporter.Import(TestDataFolder, segment, availableSoils);
+
+            // Assert
+            Assert.That(soilProfiles, Has.Count.EqualTo(2));
+
+            SoilProfile2D soilProfileOne = soilProfiles.ElementAt(0);
+            Assert.That(soilProfileOne.Name, Is.EqualTo(profileOneName));
+            CollectionAssert.AreEqual(new[]
+            {
+                "Soft Clay",
+                "Muck"
+            }, soilProfileOne.Surfaces.Select(s => s.Name));
+
+            SoilProfile2D soilProfileTwo = soilProfiles.ElementAt(1);
+            Assert.That(soilProfileTwo.Name, Is.EqualTo(profileTwoName));
+            CollectionAssert.AreEquivalent(new[]
+            {
+                "Soft Clay",
+                "Sand",
+                "Peat",
+                "Soft Clay"
+            }, soilProfileTwo.Surfaces.Select(s => s.Name)); // Check only whether all the surfaces are present as the order differs on different machines.
+        }
+
+        [Test]
+        public void Import_WithProfileNamesNotHavingStiExtension_ReturnsExpectedSoilProfiles()
+        {
+            // Setup
+            const string profileOneFileName = "SimpleProfile";
+            const string profileTwoFileName = "Tutorial-1a 10.1.4.3";
+            Segment segment = CreateSegmentWithProfiles(new[]
+            {
                 profileOneFileName,
                 profileTwoFileName
             });
@@ -92,7 +136,7 @@
                 "Peat",
                 "Muck"
             });
-            
+
             // Call
             IEnumerable<SoilProfile2D> soilProfiles = SoilProfile2DImporter.Import(TestDataFolder, segment, availableSoils);
 
Index: DamClients/DamUI/trunk/src/DamClientsLibrary/Deltares.Dam.Data/StiImporter/StiFileReader.cs
===================================================================
diff -u -r3059 -r3096
--- DamClients/DamUI/trunk/src/DamClientsLibrary/Deltares.Dam.Data/StiImporter/StiFileReader.cs	(.../StiFileReader.cs)	(revision 3059)
+++ DamClients/DamUI/trunk/src/DamClientsLibrary/Deltares.Dam.Data/StiImporter/StiFileReader.cs	(.../StiFileReader.cs)	(revision 3096)
@@ -62,7 +62,7 @@
             {
                 var soilProfileImporter = new SoilProfile2DFromDSerieFileImporter();
                 SoilProfile2D soilProfile = soilProfileImporter.ConvertToSoilProfile2D(filePath);
-                soilProfile.Name = Path.GetFileName(filePath);
+                soilProfile.Name = Path.GetFileNameWithoutExtension(filePath);
 
                 return soilProfile;
             }
Index: DamClients/DamUI/trunk/src/DamClientsLibrary/Deltares.Dam.Data/StiImporter/SoilProfile2DImporter.cs
===================================================================
diff -u -r3073 -r3096
--- DamClients/DamUI/trunk/src/DamClientsLibrary/Deltares.Dam.Data/StiImporter/SoilProfile2DImporter.cs	(.../SoilProfile2DImporter.cs)	(revision 3073)
+++ DamClients/DamUI/trunk/src/DamClientsLibrary/Deltares.Dam.Data/StiImporter/SoilProfile2DImporter.cs	(.../SoilProfile2DImporter.cs)	(revision 3096)
@@ -70,12 +70,13 @@
             var importedSoilProfiles = new List<SoilProfile2D>();
             foreach (SoilGeometryProbability profile in soilProfiles)
             {
-                string soilProfileFile = profile.SoilGeometry2DName;
-                SoilProfile2D readSoilProfile = ReadSoilProfile(soilProfileDirectory, soilProfileFile);
+                string profileName = profile.SoilGeometry2DName;
+                string soilProfileFileName = HasStiFileExtension(profileName) ? profileName : $"{profileName}.sti";
+                SoilProfile2D readSoilProfile = ReadSoilProfile(soilProfileDirectory, soilProfileFileName);
                 if (!IsValidSoilProfile(availableSoils, readSoilProfile))
                 {
                     string messageFormat = LocalizationManager.GetTranslatedText(typeof(SoilProfile2DImporter), "ImportSoilProfileErrorUndefinedMaterials");
-                    throw new SoilProfileImporterException(string.Format(messageFormat, soilProfileFile));
+                    throw new SoilProfileImporterException(string.Format(messageFormat, soilProfileFileName));
                 }
 
                 importedSoilProfiles.Add(readSoilProfile);
@@ -109,6 +110,11 @@
             }
         }
 
+        private static bool HasStiFileExtension(string profileName)
+        {
+            return string.Equals(Path.GetExtension(profileName), ".sti", StringComparison.OrdinalIgnoreCase);
+        }
+
         private static bool IsValidSoilProfile(SoilList availableSoils, SoilProfile2D profile)
         {
             var soilNames = new HashSet<string>(availableSoils.Soils.Select(s => s.Name));
Index: DamClients/DamUI/trunk/src/Dam/Tests/StiImporter/StiFileReaderTest.cs
===================================================================
diff -u -r3059 -r3096
--- DamClients/DamUI/trunk/src/Dam/Tests/StiImporter/StiFileReaderTest.cs	(.../StiFileReaderTest.cs)	(revision 3059)
+++ DamClients/DamUI/trunk/src/Dam/Tests/StiImporter/StiFileReaderTest.cs	(.../StiFileReaderTest.cs)	(revision 3096)
@@ -93,8 +93,8 @@
         public void ReadSoilProfile_WithValidFile_ReturnsExpectedSoilProfile()
         {
             // Setup
-            const string soilProfileFileName = "SimpleProfile.sti";
-            string filePath = Path.Combine(TestDataFolder, soilProfileFileName);
+            const string soilProfileName = "SimpleProfile";
+            string filePath = Path.Combine(TestDataFolder, $"{soilProfileName}.sti");
 
             var reader = new StiFileReader();
 
@@ -103,7 +103,7 @@
 
             // Assert
             Assert.That(soilProfile, Is.Not.Null);
-            Assert.That(soilProfile.Name, Is.EqualTo(soilProfileFileName));
+            Assert.That(soilProfile.Name, Is.EqualTo(soilProfileName));
             Assert.That(soilProfile.Surfaces.Count, Is.EqualTo(2));
 
             var topLeftPoint = new GeometryPoint(0, 0, -4);