diff --git a/README.md b/README.md
index 7e24607..9b3d5dc 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,7 @@
 # Advanced Docking System for Qt 
 [![Build Status](https://travis-ci.org/githubuser0xFFFF/Qt-Advanced-Docking-System.svg?branch=master)](https://travis-ci.org/githubuser0xFFFF/Qt-Advanced-Docking-System)
 [![Build status](https://ci.appveyor.com/api/projects/status/qcfb3cy932jw9mpy/branch/master?svg=true)](https://ci.appveyor.com/project/githubuser0xFFFF/qt-advanced-docking-system/branch/master)
+[![License: LGPL v2.1](https://img.shields.io/badge/License-LGPL%20v2.1-blue.svg)](gnu-lgpl-v2.1.md)
 
 
 
@@ -60,9 +61,22 @@ main window layout.
 ![Perspective](doc/perspectives_dark.png)
 
 ## Tested Compatible Environments
-- Windows 10 [![Build status](https://ci.appveyor.com/api/projects/status/qcfb3cy932jw9mpy/branch/master?svg=true)](https://ci.appveyor.com/project/githubuser0xFFFF/qt-advanced-docking-system/branch/master)
-- Ubuntu [![Build Status](https://travis-ci.org/githubuser0xFFFF/Qt-Advanced-Docking-System.svg?branch=master)](https://travis-ci.org/githubuser0xFFFF/Qt-Advanced-Docking-System)
-- macOS [![Build Status](https://travis-ci.org/githubuser0xFFFF/Qt-Advanced-Docking-System.svg?branch=master)](https://travis-ci.org/githubuser0xFFFF/Qt-Advanced-Docking-System)
+### Windows
+Windows 10 [![Build status](https://ci.appveyor.com/api/projects/status/qcfb3cy932jw9mpy/branch/master?svg=true)](https://ci.appveyor.com/project/githubuser0xFFFF/qt-advanced-docking-system/branch/master)
+
+The library was developed on and for Windows. It is used in a commercial Windows application and is therefore constantly tested.
+
+### macOS
+macOS [![Build Status](https://travis-ci.org/githubuser0xFFFF/Qt-Advanced-Docking-System.svg?branch=master)](https://travis-ci.org/githubuser0xFFFF/Qt-Advanced-Docking-System)
+
+The application can be compiled for macOS. A user reported, that the library works on macOS. If have not tested it.
+
+### Linux
+Ubuntu [![Build Status](https://travis-ci.org/githubuser0xFFFF/Qt-Advanced-Docking-System.svg?branch=master)](https://travis-ci.org/githubuser0xFFFF/Qt-Advanced-Docking-System)
+
+The application can be compiled for Linux but the master branch doesn't work under Linux because some required features are not supported by Linux. But there is the branch **linux_experimental** which was developed and tested with **Kubuntu 18.04**. and which should also work on other Linux distributions. The branch needs more testing and maybe some imrpovements before it can be merged into master.
+
+![Advanced Docking on Linux](doc/linux_kubuntu_1804.png)
 
 ## Build
 Open the `ads.pro` with QtCreator and start the build, that's it.
@@ -144,5 +158,6 @@ MainWindow::~MainWindow()
 - Manuel Freiholz 
 
 ## License information
+[![License: LGPL v2.1](https://img.shields.io/badge/License-LGPL%20v2.1-blue.svg)](gnu-lgpl-v2.1.md)
 This project uses the [LGPLv2.1 license](gnu-lgpl-v2.1.md)
 
diff --git a/demo/CMakeLists.txt b/demo/CMakeLists.txt
index 7580503..553bd18 100644
--- a/demo/CMakeLists.txt
+++ b/demo/CMakeLists.txt
@@ -23,7 +23,7 @@ set(CMAKE_INCLUDE_CURRENT_DIR ON)
 set(ads_demo_SRCS
     main.cpp
     MainWindow.cpp
-    MainWindow.ui
+    mainwindow.ui
     main.qrc
 )
 add_executable(AdvancedDockingSystemDemo WIN32 ${ads_demo_SRCS})
diff --git a/doc/linux_kubuntu_1804.png b/doc/linux_kubuntu_1804.png
new file mode 100644
index 0000000..1eb1424
Binary files /dev/null and b/doc/linux_kubuntu_1804.png differ
diff --git a/src/DockAreaWidget.cpp b/src/DockAreaWidget.cpp
index b681ede..292d54b 100644
--- a/src/DockAreaWidget.cpp
+++ b/src/DockAreaWidget.cpp
@@ -414,14 +414,15 @@ void CDockAreaWidget::removeDockWidget(CDockWidget* DockWidget)
 	auto TabWidget = DockWidget->tabWidget();
 	TabWidget->hide();
 	d->tabBar()->removeTab(TabWidget);
+	CDockContainerWidget* DockContainer = dockContainer();
 	if (NextOpenDockWidget)
 	{
 		setCurrentDockWidget(NextOpenDockWidget);
 	}
-	else if (d->ContentsLayout->isEmpty())
+	else if (d->ContentsLayout->isEmpty() && DockContainer->dockAreaCount() > 1)
 	{
 		qDebug() << "Dock Area empty";
-		dockContainer()->removeDockArea(this);
+		DockContainer->removeDockArea(this);
 		this->deleteLater();
 	}
 	else
@@ -434,14 +435,13 @@ void CDockAreaWidget::removeDockWidget(CDockWidget* DockWidget)
 
 	d->updateCloseButtonState();
 	updateTitleBarVisibility();
-	auto TopLevelDockWidget = dockContainer()->topLevelDockWidget();
+	auto TopLevelDockWidget = DockContainer->topLevelDockWidget();
 	if (TopLevelDockWidget)
 	{
 		TopLevelDockWidget->emitTopLevelChanged(true);
 	}
 
 #if (ADS_DEBUG_LEVEL > 0)
-	CDockContainerWidget* DockContainer = dockContainer();
 	DockContainer->dumpLayout();
 #endif
 }
diff --git a/src/DockContainerWidget.cpp b/src/DockContainerWidget.cpp
index 6cc3a13..3539406 100644
--- a/src/DockContainerWidget.cpp
+++ b/src/DockContainerWidget.cpp
@@ -998,6 +998,15 @@ CDockAreaWidget* CDockContainerWidget::addDockWidget(DockWidgetArea area, CDockW
 	}
 }
 
+//============================================================================
+void CDockContainerWidget::removeDockWidget(CDockWidget* Dockwidget)
+{
+	CDockAreaWidget* Area = Dockwidget->dockAreaWidget();
+	if (Area)
+	{
+		Area->removeDockWidget(Dockwidget);
+	}
+}
 
 //============================================================================
 unsigned int CDockContainerWidget::zOrderIndex() const
@@ -1057,6 +1066,12 @@ void CDockContainerWidget::removeDockArea(CDockAreaWidget* area)
 	area->setParent(nullptr);
 	internal::hideEmptyParentSplitters(Splitter);
 
+	// Remove this area from cached areas
+	const auto& cache = d->LastAddedAreaCache;
+	if (auto p = std::find(cache, cache+sizeof(cache)/sizeof(cache[0]), area)) {
+		d->LastAddedAreaCache[std::distance(cache, p)] = nullptr;
+	}
+
 	// If splitter has more than 1 widgets, we are finished and can leave
 	if (Splitter->count() >  1)
 	{
@@ -1274,6 +1289,7 @@ bool CDockContainerWidget::restoreState(QXmlStreamReader& s, bool Testing)
 	{
 		d->VisibleDockAreaCount = -1;// invalidate the dock area count
 		d->DockAreas.clear();
+		std::fill(std::begin(d->LastAddedAreaCache),std::end(d->LastAddedAreaCache), nullptr);
 	}
 
 	if (IsFloating)
diff --git a/src/DockContainerWidget.h b/src/DockContainerWidget.h
index 0483137..c923ecc 100644
--- a/src/DockContainerWidget.h
+++ b/src/DockContainerWidget.h
@@ -166,6 +166,11 @@ public:
 	CDockAreaWidget* addDockWidget(DockWidgetArea area, CDockWidget* Dockwidget,
 		CDockAreaWidget* DockAreaWidget = nullptr);
 
+	/**
+	 * Removes dockwidget
+	 */
+	void removeDockWidget(CDockWidget* Dockwidget);
+
 	/**
 	 * Returns the current zOrderIndex
 	 */
diff --git a/src/DockManager.cpp b/src/DockManager.cpp
index dfe5d6d..7a66686 100644
--- a/src/DockManager.cpp
+++ b/src/DockManager.cpp
@@ -569,9 +569,13 @@ CDockAreaWidget* CDockManager::addDockWidgetTab(DockWidgetArea area,
 	{
 		return addDockWidget(ads::CenterDockWidgetArea, Dockwidget, AreaWidget);
 	}
+	else if (!openedDockAreas().isEmpty())
+	{
+		return addDockWidget(area, Dockwidget, openedDockAreas().last());
+	}
 	else
 	{
-		return addDockWidget(area, Dockwidget, AreaWidget);
+		return addDockWidget(area, Dockwidget, nullptr);
 	}
 }
 
@@ -590,6 +594,12 @@ CDockWidget* CDockManager::findDockWidget(const QString& ObjectName) const
 	return d->DockWidgetsMap.value(ObjectName, nullptr);
 }
 
+//============================================================================
+void CDockManager::removeDockWidget(CDockWidget* Dockwidget)
+{
+	d->DockWidgetsMap.remove(Dockwidget->objectName());
+	CDockContainerWidget::removeDockWidget(Dockwidget);
+}
 
 //============================================================================
 QMap<QString, CDockWidget*> CDockManager::dockWidgetsMap() const
diff --git a/src/DockManager.h b/src/DockManager.h
index a7c088c..72ab026 100644
--- a/src/DockManager.h
+++ b/src/DockManager.h
@@ -192,6 +192,11 @@ public:
 	 */
 	CDockWidget* findDockWidget(const QString& ObjectName) const;
 
+	/**
+	 * Remove the given Dock from the dock manager
+	 */
+	void removeDockWidget(CDockWidget* Dockwidget);
+
 	/**
 	 * This function returns a readable reference to the internal dock
 	 * widgets map so that it is possible to iterate over all dock widgets
diff --git a/src/DockWidget.cpp b/src/DockWidget.cpp
index c8ca3bb..08c47e4 100644
--- a/src/DockWidget.cpp
+++ b/src/DockWidget.cpp
@@ -262,6 +262,16 @@ void CDockWidget::setWidget(QWidget* widget, eInsertMode InsertMode)
 }
 
 
+//============================================================================
+QWidget* CDockWidget::takeWidget()
+{
+	d->ScrollArea->takeWidget();
+	d->Layout->removeWidget(d->Widget);
+	d->Widget->setParent(nullptr);
+    return d->Widget;
+}
+
+
 //============================================================================
 QWidget* CDockWidget::widget() const
 {
diff --git a/src/DockWidget.h b/src/DockWidget.h
index e083137..658372f 100644
--- a/src/DockWidget.h
+++ b/src/DockWidget.h
@@ -238,6 +238,11 @@ public:
 	 */
 	void setWidget(QWidget* widget, eInsertMode InsertMode = AutoScrollArea);
 
+	/**
+	 * Remove the widget from the dock and give ownership back to the caller
+	 */
+	QWidget* takeWidget();
+
 	/**
 	 * Returns the widget for the dock widget. This function returns zero if
 	 * the widget has not been set.