Index: DamClients/DamUI/trunk/src/DamClientsLibrary/Deltares.Dam.Data/DamProject.cs
===================================================================
diff -u -r2871 -r2883
--- DamClients/DamUI/trunk/src/DamClientsLibrary/Deltares.Dam.Data/DamProject.cs	(.../DamProject.cs)	(revision 2871)
+++ DamClients/DamUI/trunk/src/DamClientsLibrary/Deltares.Dam.Data/DamProject.cs	(.../DamProject.cs)	(revision 2883)
@@ -286,6 +286,7 @@
                 else
                 {
                     var damProjectVersion = damProjectVersionXmlHandler.GetDamProjectVersion();
+                    UpdateVersionInfoForNonVersionedFiles(damProjectVersion);
                     damProjectVersion = GetMainVersion(damProjectVersion);
                     if (damProjectVersion != null)
                     {
@@ -317,13 +318,31 @@
             return damProjectData;
         }
 
+        /// <summary>Updates the current file version for non-versioned files (projects created with DAM 19.1 or earlier)
+        /// Set FileVersion to 0 (for DAM versions 18.1.3 and earlier).</summary>
+        /// Set FileVersion to 1 (for DAM version 19.1.1)</summary>
+        /// FileVersion 2 is the first versioned file (for DAM version 20.1.1)</summary>
+        private void UpdateVersionInfoForNonVersionedFiles(string fileVersion)
+        {
+            if (this.DamProjectData.VersionInfo.FileVersionAsRead == 0)
+            {
+                // If FileVersionAsRead = 0 then project was written with program version 19.1 or earlier.  
+                // For projects created with versions < 19.1 (e.g. 18.1.3) we keep the FileVersionAsRead on 0
+                // For projects created with version = 19.1 set the FileVersionAsRead on 1
+                if (this.GetMainVersion(fileVersion) == "19.1")
+                {
+                    this.DamProjectData.VersionInfo.FileVersionAsRead = 1;
+                };
+            }
+        }
+
         private void ResolveBackwardCompatibility()
         {
             if (DamProjectData.VersionInfo.FileVersionAsRead < DamProjectData.VersionInfo.FileVersion)
             {
                 string message = LocalizationManager.GetTranslatedText(this, "OpenProjectWarningFileVersion_0");
                 LogManager.Messages.Add(new LogMessage(LogMessageType.Warning, DamProjectData, message));
-                BackwardCompatibility.Update(DamProjectData, this.ProjectFileName);
+                BackwardCompatibility.Update(DamProjectData, this.ProjectFileName, DamProjectData.VersionInfo.FileVersionAsRead);
             }
         }