Solved a bug when showing the Open and Save Dialog boxes: they froze or were slow.

OpenRoadEd/Qt/MainWindow.cpp

@@ -503,7 +503,7 @@ void MainWindow::openXML()
   
   QString path=lSettingsFile.value("Path/Open",QDir::currentPath()).toString();
 	// Opens an "open file" dialog
-	QString fileName = QFileDialog::getOpenFileName(this,tr("Open File"), path, tr("OpenDRIVE (*.xodr *.xml)"));
+	QString fileName = QFileDialog::getOpenFileName(NULL,tr("Open File"), path, tr("OpenDRIVE (*.xodr *.xml)"),0,QFileDialog::DontUseNativeDialog);
 	if (fileName==NULL)
 		return;
   QFileInfo file(fileName);