diff --git a/CHANGELOG.md b/CHANGELOG.md
index a6e3d40..9cd5c25 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -10,7 +10,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 - Nothing
 
 ### Fixed
-- Nothing
+- Fixed bug where the dynamic voxel save file browser doesn't appear in Recast.Demo
 
 ### Changed
 - Changed to reuse samples and edges list in BuildPolyDetail()
diff --git a/src/DotRecast.Recast.Demo/Tools/DynamicUpdateSampleTool.cs b/src/DotRecast.Recast.Demo/Tools/DynamicUpdateSampleTool.cs
index fd54f71..54dfd25 100644
--- a/src/DotRecast.Recast.Demo/Tools/DynamicUpdateSampleTool.cs
+++ b/src/DotRecast.Recast.Demo/Tools/DynamicUpdateSampleTool.cs
@@ -116,7 +116,8 @@ public class DynamicUpdateSampleTool : ISampleTool
 
         if (mode == RcDynamicUpdateToolMode.BUILD)
         {
-            var loadVoxelPopupStrId = "Load Voxels Popup";
+            const string loadVoxelPopupStrId = "Load Voxels Popup";
+            
             bool isLoadVoxelPopup = true;
             if (ImGui.Button("Load Voxels..."))
             {
@@ -135,7 +136,7 @@ public class DynamicUpdateSampleTool : ISampleTool
                 ImGui.EndPopup();
             }
 
-            var saveVoxelPopupStrId = "Save Voxels Popup";
+            const string saveVoxelPopupStrId = "Save Voxels Popup";
             bool isSaveVoxelPopup = true;
 
             var dynaMesh = _tool.GetDynamicNavMesh();
@@ -144,7 +145,7 @@ public class DynamicUpdateSampleTool : ISampleTool
                 ImGui.Checkbox("Compression", ref compression);
                 if (ImGui.Button("Save Voxels..."))
                 {
-                    ImGui.BeginPopup(saveVoxelPopupStrId);
+                    ImGui.OpenPopup(saveVoxelPopupStrId);
                 }
 
                 if (ImGui.BeginPopupModal(saveVoxelPopupStrId, ref isSaveVoxelPopup, ImGuiWindowFlags.NoTitleBar))
@@ -152,9 +153,7 @@ public class DynamicUpdateSampleTool : ISampleTool
                     var picker = ImFilePicker.GetFilePicker(saveVoxelPopupStrId, Path.Combine(Environment.CurrentDirectory), ".voxels");
                     if (picker.Draw())
                     {
-                        if (string.IsNullOrEmpty(picker.SelectedFile))
-                            Save(picker.SelectedFile);
-
+                        Save(picker.SelectedFile);
                         ImFilePicker.RemoveFilePicker(saveVoxelPopupStrId);
                     }
 
diff --git a/src/DotRecast.Recast.Toolset/Tools/RcDynamicUpdateTool.cs b/src/DotRecast.Recast.Toolset/Tools/RcDynamicUpdateTool.cs
index 83cc474..f5e2ac5 100644
--- a/src/DotRecast.Recast.Toolset/Tools/RcDynamicUpdateTool.cs
+++ b/src/DotRecast.Recast.Toolset/Tools/RcDynamicUpdateTool.cs
@@ -159,7 +159,7 @@ namespace DotRecast.Recast.Toolset.Tools
         public void Save(string filename, bool compression, IRcCompressor compressor)
         {
             DtVoxelFile voxelFile = DtVoxelFile.From(dynaMesh);
-            using var fs = new FileStream(filename, FileMode.CreateNew, FileAccess.Write);
+            using var fs = new FileStream(filename, FileMode.OpenOrCreate, FileAccess.Write, FileShare.ReadWrite);
             using var bw = new BinaryWriter(fs);
             DtVoxelFileWriter writer = new DtVoxelFileWriter(compressor);
             writer.Write(bw, voxelFile, compression);