diff --git a/CMakeLists.txt b/CMakeLists.txt
index c2b543d3..bb1b2b3c 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -94,11 +94,11 @@ ENDIF()
 SET(SNAP_VERSION_MAJOR 4)
 SET(SNAP_VERSION_MINOR 2)
 SET(SNAP_VERSION_PATCH 0)
-SET(SNAP_VERSION_QUALIFIER "-rc.1")
+SET(SNAP_VERSION_QUALIFIER "")
 
 # These fields should also be modified each time
-SET(SNAP_VERSION_RELEASE_DATE "20240311")
-SET(SNAP_VERSION_RELEASE_DATE_FORMATTED "March 11, 2024")
+SET(SNAP_VERSION_RELEASE_DATE "20240422")
+SET(SNAP_VERSION_RELEASE_DATE_FORMATTED "April 22, 2024")
 
 # This field should only change when the format of the settings files changes
 # in a non backwards-compatible way
diff --git a/GUI/Qt/Windows/DropActionDialog.cxx b/GUI/Qt/Windows/DropActionDialog.cxx
index f5d867cb..471ce7a7 100644
--- a/GUI/Qt/Windows/DropActionDialog.cxx
+++ b/GUI/Qt/Windows/DropActionDialog.cxx
@@ -21,8 +21,9 @@
 #include "MeshImportWizard.h"
 #include "ImageIOWizardModel.h"
 #include "ImageIOWizard.h"
-#include "GuidedNativeImageIO.h"
+#include "GuidedMeshIO.h"
 #include <itkImageIOBase.h>
+#include <QFileInfo>
 
 DropActionDialog::DropActionDialog(QWidget *parent) :
   QDialog(parent),
@@ -42,21 +43,50 @@ void DropActionDialog::SetDroppedFilename(QString name)
 
   bool isWorkspace4D = m_Model->GetDriver()->GetNumberOfTimePoints() > 1;
 
-  auto io = GuidedNativeImageIO::New();
-  Registry dummyReg;
-  io->ReadNativeImageHeader(name.toStdString().c_str(), dummyReg);
-  auto header = io->GetIOBase();
-  QString btnLoadSegText("Load as Segmentation");
-  QString btnLoadSegToolTip("This will replace the current segmentation image with the dropped image.");
+  // Check if the file can be loaded as mesh
+  bool isPolyData = GuidedMeshIO::IsFilePolyData(to_utf8(name).c_str());
+
+  QFileInfo fileinfo(name);
+  auto ext = fileinfo.completeSuffix();
+  auto fmt = GuidedMeshIO::GetFormatByExtension(ext.toStdString());
 
-  if (header->GetNumberOfDimensions() < 4 && isWorkspace4D)
+  if (isPolyData)
     {
-    btnLoadSegText = QString("Load as Segmentation in Time Point");
-    btnLoadSegToolTip = QString("This will replace the segmentation in current time point");
+    if (GuidedMeshIO::can_read(fmt))
+      {
+      this->SetIncludeMeshOptions(true);
+      }
+    else
+      {
+      QMessageBox msgBox;
+      std::ostringstream oss;
+      oss << "Unsupported mesh file type (" << ext.toStdString() << ")!";
+      msgBox.setText(oss.str().c_str());
+      msgBox.exec();
+      this->reject();
+      return;
+      }
     }
+  else
+    {
+    this->SetIncludeMeshOptions(false);
+    // Run segmentation 3d & 4d check
+    auto io = GuidedNativeImageIO::New();
+    Registry dummyReg;
+    io->ReadNativeImageHeader(name.toStdString().c_str(), dummyReg);
+    auto header = io->GetIOBase();
+    QString btnLoadSegText("Load as Segmentation");
+    QString btnLoadSegToolTip("This will replace the current segmentation image with the dropped image.");
+
+    if (header->GetNumberOfDimensions() < 4 && isWorkspace4D)
+      {
+      btnLoadSegText = QString("Load as Segmentation in Time Point");
+      btnLoadSegToolTip = QString("This will replace the segmentation in current time point");
+      }
 
-  ui->btnLoadSegmentation->setText(btnLoadSegText);
-  ui->btnLoadSegmentation->setToolTip(btnLoadSegToolTip);
+    ui->btnLoadSegmentation->setText(btnLoadSegText);
+    ui->btnLoadSegmentation->setToolTip(btnLoadSegToolTip);
+    }
 }
 
 void DropActionDialog::SetModel(GlobalUIModel *model)
@@ -164,20 +194,6 @@ void DropActionDialog::on_btnLoadMeshToTP_clicked()
 {
   // Get file extension
   std::string fn = ui->outFilename->text().toStdString();
-  // Get the file extension with the dot. e.g. ".vtk"
-  std::string ext = fn.substr(fn.find_last_of("."));
-
-  auto fmt = GuidedMeshIO::GetFormatByExtension(ext);
-  if (fmt == GuidedMeshIO::FORMAT_COUNT)
-    {
-    QMessageBox msgBox;
-    std::ostringstream oss;
-    oss << "Unsupported mesh file type (" << ext << ")!";
-    msgBox.setText(oss.str().c_str());
-    msgBox.exec();
-    this->reject();
-    return;
-    }
 
   unsigned int displayTP = m_Model->GetDriver()->GetCursorTimePoint() + 1; // always display 1-based tp index
   QMessageBox *box = MeshImportWizard::CreateLoadToTimePointMessageBox(this, displayTP);
@@ -189,7 +205,7 @@ void DropActionDialog::on_btnLoadMeshToTP_clicked()
     case QMessageBox::Ok:
       {
       auto model = m_Model->GetMeshImportModel();
-      model->LoadToTP(fn.c_str(), fmt);
+      model->LoadToTP(fn.c_str(), GuidedMeshIO::GetFormatByFilename((fn.c_str())));
       this->accept();
       return;
       }
diff --git a/GUI/Qt/Windows/MainImageWindow.cxx b/GUI/Qt/Windows/MainImageWindow.cxx
index 44d2e4a3..f86b96d5 100644
--- a/GUI/Qt/Windows/MainImageWindow.cxx
+++ b/GUI/Qt/Windows/MainImageWindow.cxx
@@ -1289,12 +1289,6 @@ void MainImageWindow::LoadDroppedFile(QString file)
       m_DropDialog->SetDroppedFilename(file);
       m_DropDialog->setModal(true);
 
-      // Check if the file can be loaded as mesh
-      QFileInfo fileinfo(file);
-      auto ext = fileinfo.completeSuffix();
-      auto fmt = GuidedMeshIO::GetFormatByExtension(ext.toStdString());
-      m_DropDialog->SetIncludeMeshOptions(GuidedMeshIO::can_read(fmt));
-
       RaiseDialog(m_DropDialog);
       }
     else
diff --git a/Logic/Mesh/GuidedMeshIO.cxx b/Logic/Mesh/GuidedMeshIO.cxx
index 4877c13c..d365cebc 100644
--- a/Logic/Mesh/GuidedMeshIO.cxx
+++ b/Logic/Mesh/GuidedMeshIO.cxx
@@ -1,13 +1,16 @@
 #include "GuidedMeshIO.h"
-#include "vtkPolyDataWriter.h"
-#include "vtkSTLWriter.h"
-#include "vtkBYUWriter.h"
-#include "vtkTriangleFilter.h"
-#include "itkMacro.h"
 #include "MeshIODelegates.h"
 #include "MeshWrapperBase.h"
 #include "StandaloneMeshWrapper.h"
 
+#include <itkMacro.h>
+#include <itksys/SystemTools.hxx>
+#include <vtkDataReader.h>
+#include <vtkPolyDataWriter.h>
+#include <vtkSTLWriter.h>
+#include <vtkBYUWriter.h>
+#include <vtkTriangleFilter.h>
+
 GuidedMeshIO
 ::GuidedMeshIO()
 {
@@ -179,3 +182,21 @@ GuidedMeshIO::GetErrorMessage() const
 {
   return m_ErrorMessage;
 }
+
+bool
+GuidedMeshIO
+::IsFilePolyData(const char *filename)
+{
+  auto reader = vtkNew<vtkDataReader>();
+  reader->SetFileName(filename);
+  return reader->IsFilePolyData();
+}
+
+GuidedMeshIO::FileFormat
+GuidedMeshIO
+::GetFormatByFilename(const char *filename)
+{
+  // extract extension
+  std::string ext = itksys::SystemTools::GetFilenameLastExtension(filename);
+  return GetFormatByExtension(ext);
+}
diff --git a/Logic/Mesh/GuidedMeshIO.h b/Logic/Mesh/GuidedMeshIO.h
index e5f42043..6dfe6550 100644
--- a/Logic/Mesh/GuidedMeshIO.h
+++ b/Logic/Mesh/GuidedMeshIO.h
@@ -109,6 +109,11 @@ class GuidedMeshIO
   /** Get Enum File Format Registry Map */
   static RegistryEnumMap<FileFormat> &GetEnumFileFormat()
   { return m_EnumFileFormat; }
+
+  static bool IsFilePolyData(const char *filename);
+
+  static FileFormat GetFormatByFilename(const char *filename);
+
 protected:
   /** Registry mappings for these enums */
   static RegistryEnumMap<FileFormat> m_EnumFileFormat;