diff --git a/api/logic/launch/LaunchTask.cpp b/api/logic/launch/LaunchTask.cpp
index ea4ed43e..8d9596ec 100644
--- a/api/logic/launch/LaunchTask.cpp
+++ b/api/logic/launch/LaunchTask.cpp
@@ -150,6 +150,26 @@ void LaunchTask::proceed()
 	m_steps[currentStep]->proceed();
 }
 
+bool LaunchTask::canAbort() const
+{
+	switch(state)
+	{
+		case LaunchTask::Aborted:
+		case LaunchTask::Failed:
+		case LaunchTask::Finished:
+			return false;
+		case LaunchTask::NotStarted:
+			return true;
+		case LaunchTask::Running:
+		case LaunchTask::Waiting:
+		{
+			auto step = m_steps[currentStep];
+			return step->canAbort();
+		}
+	}
+	return false;
+}
+
 bool LaunchTask::abort()
 {
 	switch(state)
diff --git a/api/logic/launch/LaunchTask.h b/api/logic/launch/LaunchTask.h
index 981e25cf..e74620c7 100644
--- a/api/logic/launch/LaunchTask.h
+++ b/api/logic/launch/LaunchTask.h
@@ -80,7 +80,9 @@ public: /* methods */
 	/**
 	 * @brief abort launch
 	 */
-	virtual bool abort() override;
+	bool abort() override;
+
+	bool canAbort() const override;
 
 	shared_qobject_ptr<LogModel> getLogModel();
 
diff --git a/application/InstanceWindow.cpp b/application/InstanceWindow.cpp
index e3d4af66..b88048a8 100644
--- a/application/InstanceWindow.cpp
+++ b/application/InstanceWindow.cpp
@@ -168,18 +168,9 @@ void InstanceWindow::on_btnKillMinecraft_clicked()
 {
 	if(m_instance->isRunning())
 	{
-		auto response = CustomMessageBox::selectable(
-			this, tr("Kill Minecraft?"),
-			tr("This can cause the instance to get corrupted and should only be used if Minecraft "
-			"is frozen for some reason"),
-			QMessageBox::Question, QMessageBox::Yes | QMessageBox::No, QMessageBox::Yes)->exec();
-		if (response == QMessageBox::Yes)
-		{
-			m_proc->abort();
-		}
+		MMC->kill(m_instance);
 	}
-	// FIXME: duplicate logic between MainWindow and InstanceWindow
-	else if(saveAll())
+	else
 	{
 		MMC->launch(m_instance, true, nullptr);
 	}
diff --git a/application/LaunchController.cpp b/application/LaunchController.cpp
index eaeb9b28..62e582d8 100644
--- a/application/LaunchController.cpp
+++ b/application/LaunchController.cpp
@@ -288,3 +288,25 @@ void LaunchController::onProgressRequested(Task* task)
 	m_launcher->proceed();
 	progDialog.execWithTask(task);
 }
+
+bool LaunchController::abort()
+{
+	if(!m_launcher)
+	{
+		return true;
+	}
+	if(!m_launcher->canAbort())
+	{
+		return false;
+	}
+	auto response = CustomMessageBox::selectable(
+			m_parentWidget, tr("Kill Minecraft?"),
+			tr("This can cause the instance to get corrupted and should only be used if Minecraft "
+			"is frozen for some reason"),
+			QMessageBox::Question, QMessageBox::Yes | QMessageBox::No, QMessageBox::Yes)->exec();
+	if (response == QMessageBox::Yes)
+	{
+		return m_launcher->abort();
+	}
+	return false;
+}
diff --git a/application/LaunchController.h b/application/LaunchController.h
index 81f3a0ab..84c65743 100644
--- a/application/LaunchController.h
+++ b/application/LaunchController.h
@@ -8,7 +8,7 @@ class LaunchController: public Task
 {
 	Q_OBJECT
 public:
-	virtual void executeTask();
+	void executeTask() override;
 
 	LaunchController(QObject * parent = nullptr);
 	virtual ~LaunchController(){};
@@ -37,6 +37,7 @@ public:
 	{
 		return m_instance->id();
 	}
+	bool abort() override;
 
 private:
 	void login();
diff --git a/application/MainWindow.cpp b/application/MainWindow.cpp
index 4e649521..7b957c70 100644
--- a/application/MainWindow.cpp
+++ b/application/MainWindow.cpp
@@ -130,6 +130,26 @@ public:
 	QStatusBar *statusBar;
 	QToolBar *instanceToolBar;
 	QToolBar *newsToolBar;
+	bool m_kill = false;
+
+	void updateLaunchAction()
+	{
+		if(m_kill)
+		{
+			actionLaunchInstance->setText(tr("Kill"));
+			actionLaunchInstance->setToolTip(tr("Kill the running instance"));
+		}
+		else
+		{
+			actionLaunchInstance->setText(tr("Launch"));
+			actionLaunchInstance->setToolTip(tr("Launch the selected instance."));
+		}
+	}
+	void setLaunchAction(bool kill)
+	{
+		m_kill = kill;
+		updateLaunchAction();
+	}
 
 	void setupUi(QMainWindow *MainWindow)
 	{
@@ -279,13 +299,13 @@ public:
 		instanceToolBar->addAction(actionChangeInstIcon);
 		instanceToolBar->addAction(actionLaunchInstance);
 		instanceToolBar->addAction(actionLaunchInstanceOffline);
-		instanceToolBar->addAction(actionChangeInstGroup);
 		instanceToolBar->addSeparator();
 		instanceToolBar->addAction(actionEditInstance);
 		instanceToolBar->addAction(actionInstanceSettings);
 		instanceToolBar->addAction(actionEditInstNotes);
 		instanceToolBar->addAction(actionWorlds);
 		instanceToolBar->addAction(actionScreenshots);
+		instanceToolBar->addAction(actionChangeInstGroup);
 		instanceToolBar->addSeparator();
 		instanceToolBar->addAction(actionViewSelectedInstFolder);
 		instanceToolBar->addAction(actionConfig_Folder);
@@ -325,8 +345,7 @@ public:
 		actionMoreNews->setToolTip(tr("Open the MultiMC development blog to read more news about MultiMC."));
 		actionAbout->setText(tr("About MultiMC"));
 		actionAbout->setToolTip(tr("View information about MultiMC."));
-		actionLaunchInstance->setText(tr("Play"));
-		actionLaunchInstance->setToolTip(tr("Launch the selected instance."));
+		updateLaunchAction();
 		actionRenameInstance->setText(tr("Instance Name"));
 		actionRenameInstance->setToolTip(tr("Rename the selected instance."));
 		actionChangeInstGroup->setText(tr("Change Group"));
@@ -355,7 +374,7 @@ public:
 		actionCopyInstance->setToolTip(tr("Copy the selected instance."));
 		actionManageAccounts->setText(tr("Manage Accounts"));
 		actionManageAccounts->setToolTip(tr("Manage your Mojang or Minecraft accounts."));
-		actionLaunchInstanceOffline->setText(tr("Play Offline"));
+		actionLaunchInstanceOffline->setText(tr("Launch Offline"));
 		actionLaunchInstanceOffline->setToolTip(tr("Launch the selected instance in offline mode."));
 		actionScreenshots->setText(tr("Manage Screenshots"));
 		actionScreenshots->setToolTip(tr("View and upload screenshots for this instance."));
@@ -662,8 +681,15 @@ void MainWindow::showInstanceContextMenu(const QPoint &pos)
 
 void MainWindow::updateToolsMenu()
 {
-	QMenu *launchMenu = ui->actionLaunchInstance->menu();
 	QToolButton *launchButton = dynamic_cast<QToolButton*>(ui->instanceToolBar->widgetForAction(ui->actionLaunchInstance));
+	if(m_selectedInstance->isRunning())
+	{
+		ui->actionLaunchInstance->setMenu(nullptr);
+		launchButton->setPopupMode(QToolButton::InstantPopup);
+		return;
+	}
+
+	QMenu *launchMenu = ui->actionLaunchInstance->menu();
 	launchButton->setPopupMode(QToolButton::MenuButtonPopup);
 	if (launchMenu)
 	{
@@ -837,7 +863,7 @@ bool MainWindow::eventFilter(QObject *obj, QEvent *ev)
 			{
 			case Qt::Key_Enter:
 			case Qt::Key_Return:
-				on_actionLaunchInstance_triggered();
+				activateInstance(m_selectedInstance);
 				return true;
 			case Qt::Key_Delete:
 				on_actionDeleteInstance_triggered();
@@ -1412,17 +1438,30 @@ void MainWindow::instanceActivated(QModelIndex index)
 	if (!inst)
 		return;
 
-	MMC->launch(inst);
+	activateInstance(inst);
 }
 
 void MainWindow::on_actionLaunchInstance_triggered()
 {
-	if (m_selectedInstance)
+	if (!m_selectedInstance)
+	{
+		return;
+	}
+	if(m_selectedInstance->isRunning())
+	{
+		MMC->kill(m_selectedInstance);
+	}
+	else
 	{
 		MMC->launch(m_selectedInstance);
 	}
 }
 
+void MainWindow::activateInstance(InstancePtr instance)
+{
+	MMC->launch(instance);
+}
+
 void MainWindow::on_actionLaunchInstanceOffline_triggered()
 {
 	if (m_selectedInstance)
@@ -1460,7 +1499,16 @@ void MainWindow::instanceChanged(const QModelIndex &current, const QModelIndex &
 	if (m_selectedInstance)
 	{
 		ui->instanceToolBar->setEnabled(true);
-		ui->actionLaunchInstance->setEnabled(m_selectedInstance->canLaunch());
+		if(m_selectedInstance->isRunning())
+		{
+			ui->actionLaunchInstance->setEnabled(true);
+			ui->setLaunchAction(true);
+		}
+		else
+		{
+			ui->actionLaunchInstance->setEnabled(m_selectedInstance->canLaunch());
+			ui->setLaunchAction(false);
+		}
 		ui->actionLaunchInstanceOffline->setEnabled(m_selectedInstance->canLaunch());
 		ui->actionExportInstance->setEnabled(m_selectedInstance->canExport());
 		renameButton->setText(m_selectedInstance->name());
diff --git a/application/MainWindow.h b/application/MainWindow.h
index 3ee03a7f..459c17c2 100644
--- a/application/MainWindow.h
+++ b/application/MainWindow.h
@@ -162,6 +162,7 @@ private slots:
 	void downloadUpdates(GoUpdate::Status status);
 
 private:
+	void activateInstance(InstancePtr instance);
 	void setCatBackground(bool enabled);
 	void updateInstanceToolIcon(QString new_icon);
 	void setSelectedInstanceById(const QString &id);
diff --git a/application/MultiMC.cpp b/application/MultiMC.cpp
index 93f7a33f..49c1d2c4 100644
--- a/application/MultiMC.cpp
+++ b/application/MultiMC.cpp
@@ -877,7 +877,7 @@ bool MultiMC::openJsonEditor(const QString &filename)
 	}
 }
 
-void MultiMC::launch(InstancePtr instance, bool online, BaseProfilerFactory *profiler)
+bool MultiMC::launch(InstancePtr instance, bool online, BaseProfilerFactory *profiler)
 {
 	if(instance->canLaunch())
 	{
@@ -887,7 +887,7 @@ void MultiMC::launch(InstancePtr instance, bool online, BaseProfilerFactory *pro
 		{
 			if(!window->saveAll())
 			{
-				return;
+				return false;
 			}
 		}
 		auto & controller = extras.controller;
@@ -907,13 +907,33 @@ void MultiMC::launch(InstancePtr instance, bool online, BaseProfilerFactory *pro
 		connect(controller.get(), &LaunchController::failed, this, &MultiMC::controllerFailed);
 		controller->start();
 		m_runningInstances ++;
+		return true;
 	}
 	else if (instance->isRunning())
 	{
 		showInstanceWindow(instance, "console");
+		return true;
 	}
+	return false;
 }
 
+bool MultiMC::kill(InstancePtr instance)
+{
+	if (!instance->isRunning())
+	{
+		qWarning() << "Attempted to kill instance" << instance->id() << "which isn't running.";
+		return false;
+	}
+	auto & extras = m_instanceExtras[instance->id()];
+	auto & controller = extras.controller;
+	if(controller)
+	{
+		return controller->abort();
+	}
+	return true;
+}
+
+
 void MultiMC::controllerSucceeded()
 {
 	auto controller = qobject_cast<LaunchController *>(QObject::sender());
diff --git a/application/MultiMC.h b/application/MultiMC.h
index ae0ed531..9c9d0c8a 100644
--- a/application/MultiMC.h
+++ b/application/MultiMC.h
@@ -148,7 +148,8 @@ public:
 	}
 
 public slots:
-	void launch(InstancePtr instance, bool online = true, BaseProfilerFactory *profiler = nullptr);
+	bool launch(InstancePtr instance, bool online = true, BaseProfilerFactory *profiler = nullptr);
+	bool kill(InstancePtr instance);
 
 private slots:
 	/**