1 files changed, 18 insertions, 3 deletions
diff --git a/application/MainWindow.cpp b/application/MainWindow.cpp
index bf9da0dc..70a0fbf1 100644
--- a/application/MainWindow.cpp
+++ b/application/MainWindow.cpp
@@ -1356,12 +1356,27 @@ void MainWindow::on_actionViewSelectedInstFolder_triggered()
 
 void MainWindow::closeEvent(QCloseEvent *event)
 {
-	// Save the window state and geometry.
+	if(MMC->numRunningInstances())
+	{
+		auto resBtn = QMessageBox::question(
+			this,
+			tr("Do you want to close MultiMC?"),
+			tr("<p>You still have instances running.</p><p>Closing MultiMC will result in inaccurate time tracking and no Minecraft crash handling.</p><p>Are you sure?</p>"),
+			QMessageBox::No | QMessageBox::Yes,
+			QMessageBox::Yes
+		);
+		if (resBtn != QMessageBox::Yes)
+		{
+			event->ignore();
+			return;
+		}
+	}
 
+	// no running instances or user said yes.
+	event->accept();
+	// Save the window state and geometry.
 	MMC->settings()->set("MainWindowState", saveState().toBase64());
 	MMC->settings()->set("MainWindowGeometry", saveGeometry().toBase64());
-
-	QMainWindow::closeEvent(event);
 	QApplication::exit();
 }