fixes

src/modules/registrypreview/RegistryPreviewUILib/RegistryPreviewMainPage.Events.cs

@@ -110,7 +110,7 @@ private async void OpenButton_Click(object sender, RoutedEventArgs e)
                 {
                     case ContentDialogResult.Primary:
                         // Save, then continue the file open
-                        if (!AskFileName(_appFileName) ||
+                        if (!AskFileName(string.Empty) ||
                             !SaveFile())
                         {
                             return;
@@ -167,7 +167,7 @@ private async void OpenButton_Click(object sender, RoutedEventArgs e)
         /// </summary>
         private void SaveButton_Click(object sender, RoutedEventArgs e)
         {
-            if (!AskFileName(_appFileName))
+            if (!AskFileName(string.Empty))
             {
                 return;
             }
@@ -181,6 +181,7 @@ private void SaveButton_Click(object sender, RoutedEventArgs e)
         /// </summary>
         private async void SaveAsButton_Click(object sender, RoutedEventArgs e)
         {
+            newFileLoaded = true;
             if (!AskFileName(_appFileName) || !SaveFile())
             {
                 return;
@@ -267,7 +268,7 @@ private async void WriteButton_Click(object sender, RoutedEventArgs e)
                 {
                     case ContentDialogResult.Primary:
                         // Save, then continue the file open
-                        if (!AskFileName(_appFileName) ||
+                        if (!AskFileName(string.Empty) ||
                             !SaveFile())
                         {
                             return;

src/modules/registrypreview/RegistryPreviewUILib/RegistryPreviewMainPage.Utilities.cs

@@ -834,7 +834,7 @@ private async void HandleDirtyClosing(string title, string content, string prima
             {
                 case ContentDialogResult.Primary:
                     // Save, then close
-                    if (!AskFileName(_appFileName) ||
+                    if (!AskFileName(string.Empty) ||
                         !SaveFile())
                     {
                         return;