diff --git a/bin/app/data/gui/icon/project_256_256.png b/bin/app/data/gui/icon/project_256_256.png
new file mode 100644
index 00000000..d6726001
Binary files /dev/null and b/bin/app/data/gui/icon/project_256_256.png differ
diff --git a/setup/MacOSX/Info.plist.in b/setup/MacOSX/Info.plist.in
index b9a19f4f..e38dbb53 100644
--- a/setup/MacOSX/Info.plist.in
+++ b/setup/MacOSX/Info.plist.in
@@ -40,5 +40,20 @@
 	<string>icon</string>
 	<key>LSMinimumSystemVersion</key>
 	<string>10.9</string>
+	<key>CFBundleDocumentTypes</key>
+	<array>
+		<dict>
+			<key>CFBundleTypeRole</key>
+			<string>Editor</string>
+			<key>CFBundleTypeName</key>
+			<string>Coati Project</string>
+			<key>CFBundleTypeExtensions</key>
+			<array>
+				<string>coatiproject</string>
+			</array>
+			<key>CFBundleTypeIconFile</key>
+			<string>project</string>
+		</dict>
+	</array>
 </dict>
 </plist>
diff --git a/setup/MacOSX/bundle_install.sh.in b/setup/MacOSX/bundle_install.sh.in
index 2e2ab74f..d5d8c953 100755
--- a/setup/MacOSX/bundle_install.sh.in
+++ b/setup/MacOSX/bundle_install.sh.in
@@ -102,9 +102,9 @@ do
 	echo "lib" $LIB_PATH $LIB_NAME
 done
 
-echo -e $INFO "Fixing lib dependencies"
-install_name_tool -change libboost_system.dylib @executable_path/../lib/libboost_system.dylib $DYNLIB_DIR/libboost_filesystem.dylib
-otool -L $DYNLIB_DIR/libboost_filesystem.dylib
+# echo -e $INFO "Fixing lib dependencies"
+# install_name_tool -change libboost_system.dylib @executable_path/../lib/libboost_system.dylib $DYNLIB_DIR/libboost_filesystem.dylib
+# otool -L $DYNLIB_DIR/libboost_filesystem.dylib
 
 
 echo -e $INFO "Copying Plugins"
@@ -160,7 +160,7 @@ echo -e $INFO "App dependencies"
 otool -L $APP_PATH
 
 echo -e $INFO "Create icon"
-ICON=../data/gui/installer/logo_1024_1024.png
+ICON=../data/gui/icon/logo_1024_1024.png
 ICON_SET=$RES_DIR/icon.iconset
 
 mkdir -p $ICON_SET
@@ -177,6 +177,26 @@ convert $ICON -resize 1024x1024 $ICON_SET/icon_512x512@2x.png
 
 iconutil -c icns -o $RES_DIR/icon.icns $ICON_SET
 
+echo -e $INFO "Create project icon"
+ICON=../data/gui/icon/project_256_256.png
+ICON_SET=$RES_DIR/project.iconset
+
+mkdir -p $ICON_SET
+convert $ICON -resize 16x16 $ICON_SET/icon_16x16.png
+convert $ICON -resize 32x32 $ICON_SET/icon_16x16@2x.png
+convert $ICON -resize 32x32 $ICON_SET/icon_32x32.png
+convert $ICON -resize 64x64 $ICON_SET/icon_32x32@2x.png
+convert $ICON -resize 64x64 $ICON_SET/icon_64x64.png
+convert $ICON -resize 128x128 $ICON_SET/icon_64x64@2x.png
+convert $ICON -resize 128x128 $ICON_SET/icon_128x128.png
+convert $ICON -resize 256x256 $ICON_SET/icon_128x128@2x.png
+convert $ICON -resize 256x256 $ICON_SET/icon_256x256.png
+convert $ICON -resize 512x512 $ICON_SET/icon_256x256@2x.png
+convert $ICON -resize 512x512 $ICON_SET/icon_512x512.png
+convert $ICON -resize 1024x1024 $ICON_SET/icon_512x512@2x.png
+
+iconutil -c icns -o $RES_DIR/project.icns $ICON_SET
+
 echo -e $INFO "Obfuscate binary"
 # upx -1 $APP_PATH
 upx --best $APP_PATH
diff --git a/src/app/LicenseChecker.h b/src/app/LicenseChecker.h
index 551b18fc..7a1b8c49 100644
--- a/src/app/LicenseChecker.h
+++ b/src/app/LicenseChecker.h
@@ -2,6 +2,7 @@
 #define LICENSE_CHECKER_H
 
 #include "utility/messaging/MessageListener.h"
+#include "utility/messaging/type/MessageEnteredLicense.h"
 #include "utility/messaging/type/MessageLoadProject.h"
 #include "utility/messaging/type/MessageStatus.h"
 
@@ -12,25 +13,49 @@
 #include "utility/AppPath.h"
 
 class LicenseChecker
-	: public MessageListener<MessageLoadProject>
+	: public MessageListener<MessageEnteredLicense>
+	, public MessageListener<MessageLoadProject>
 {
 public:
+	LicenseChecker()
+		: m_forcedLicenseEntering(false)
+	{
+	}
+
 	inline void setApp(Application* app)
 	{
 		m_app = app;
-		if (!checkLicenseString())
+		if (!m_forcedLicenseEntering && !checkLicenseString())
 		{
 			m_app->showLicenseScreen();
+			m_forcedLicenseEntering = true;
 		}
 	}
 
 private:
+	void handleMessage(MessageEnteredLicense* message)
+	{
+		m_forcedLicenseEntering = false;
+
+		if (m_resendMessage)
+		{
+			m_resendMessage->dispatch();
+			m_resendMessage.reset();
+		}
+	}
+
 	void handleMessage(MessageLoadProject* message)
 	{
 		if (!checkLicenseString())
 		{
+			m_resendMessage = std::make_shared<MessageLoadProject>(*message);
 			message->cancel();
-			m_app->showLicenseScreen();
+
+			if (!m_forcedLicenseEntering)
+			{
+				m_app->showLicenseScreen();
+				m_forcedLicenseEntering = true;
+			}
 		}
 	}
 
@@ -77,6 +102,8 @@ private:
 	}
 
 	Application* m_app;
+	std::shared_ptr<MessageBase> m_resendMessage;
+	bool m_forcedLicenseEntering;
 };
 
 #endif // LICENSE_CHECKER_H
diff --git a/src/app/main.cpp b/src/app/main.cpp
index 91f8588c..a14a086f 100644
--- a/src/app/main.cpp
+++ b/src/app/main.cpp
@@ -1,25 +1,22 @@
-#include <memory>
-
-#include <QApplication>
-
+#include "utility/AppPath.h"
 #include "utility/logging/ConsoleLogger.h"
 #include "utility/logging/FileLogger.h"
 #include "utility/logging/LogManager.h"
+#include "utility/ResourcePaths.h"
 #include "utility/Version.h"
 
 #include "Application.h"
 #include "includes.h" // defines 'void setup(int argc, char *argv[])'
 #include "LicenseChecker.h"
 #include "qt/commandline/QtCommandLineParser.h"
-#include "qt/window/QtMainWindow.h"
-#include "qt/window/QtSplashScreen.h"
 #include "qt/network/QtNetworkFactory.h"
+#include "qt/QtApplication.h"
 #include "qt/utility/utilityQt.h"
 #include "qt/view/QtViewFactory.h"
+#include "qt/window/QtMainWindow.h"
+#include "qt/window/QtSplashScreen.h"
 #include "version.h"
 
-#include "utility/AppPath.h"
-#include "utility/ResourcePaths.h"
 
 void init()
 {
@@ -40,14 +37,10 @@ int main(int argc, char *argv[])
 	Version version = Version::fromString(GIT_VERSION_NUMBER);
 
 	setup(argc, argv);
-	QApplication qtApp(argc, argv);
+	QtApplication qtApp(argc, argv);
 	QApplication::setApplicationName("Coati");
 	QApplication::setApplicationVersion(version.toDisplayString().c_str());
 
-	QtCommandLineParser commandLineParser;
-	commandLineParser.setup();
-	commandLineParser.process(qtApp);
-
 	qtApp.setAttribute(Qt::AA_UseHighDpiPixmaps);
 
 	QPixmap whitePixmap(500, 500);
@@ -60,6 +53,10 @@ int main(int argc, char *argv[])
 
 	init();
 
+	QtCommandLineParser commandLineParser;
+	commandLineParser.setup();
+	commandLineParser.process(qtApp);
+
 	QtViewFactory viewFactory;
 	QtNetworkFactory networkFactory;
 
diff --git a/src/lib/Application.cpp b/src/lib/Application.cpp
index 833bf2ab..2b1b8d71 100644
--- a/src/lib/Application.cpp
+++ b/src/lib/Application.cpp
@@ -46,6 +46,8 @@ std::shared_ptr<Application> Application::create(
 
 	ptr->m_ideCommunicationController = networkFactory->createIDECommunicationController(ptr->m_storageCache.get());
 
+	ptr->startMessagingAndScheduling();
+
 	return ptr;
 }
 
@@ -59,9 +61,6 @@ void Application::loadSettings()
 
 Application::Application()
 {
-	TaskScheduler::getInstance()->startSchedulerLoopThreaded();
-	MessageQueue::getInstance()->setSendMessagesAsTasks(true);
-	MessageQueue::getInstance()->startMessageLoopThreaded();
 }
 
 Application::~Application()
@@ -161,6 +160,13 @@ void Application::handleMessage(MessageSaveProject* message)
 	saveProject(message->projectSettingsFilePath);
 }
 
+void Application::startMessagingAndScheduling()
+{
+	TaskScheduler::getInstance()->startSchedulerLoopThreaded();
+	MessageQueue::getInstance()->setSendMessagesAsTasks(true);
+	MessageQueue::getInstance()->startMessageLoopThreaded();
+}
+
 void Application::updateRecentProjects(const FilePath& projectSettingsFilePath)
 {
 	ApplicationSettings* appSettings = ApplicationSettings::getInstance().get();
diff --git a/src/lib/Application.h b/src/lib/Application.h
index 8235d8d3..dc572c5f 100644
--- a/src/lib/Application.h
+++ b/src/lib/Application.h
@@ -48,6 +48,8 @@ private:
 	virtual void handleMessage(MessageRefresh* message);
 	virtual void handleMessage(MessageSaveProject* message);
 
+	void startMessagingAndScheduling();
+
 	void updateRecentProjects(const FilePath& projectSettingsFilePath);
 
 	std::shared_ptr<Project> m_project;
diff --git a/src/lib/CMakeLists.txt b/src/lib/CMakeLists.txt
index 2fe989d0..6106f6a8 100644
--- a/src/lib/CMakeLists.txt
+++ b/src/lib/CMakeLists.txt
@@ -223,6 +223,7 @@ add_files(
 	utility/messaging/type/MessageChangeFileView.h
 	utility/messaging/type/MessageClearErrorCount.h
 	utility/messaging/type/MessageDeactivateEdge.h
+	utility/messaging/type/MessageEnteredLicense.h
 	utility/messaging/type/MessageFind.h
 	utility/messaging/type/MessageFinishedParsing.h
 	utility/messaging/type/MessageFlushUpdates.h
diff --git a/src/lib/utility/messaging/type/MessageEnteredLicense.h b/src/lib/utility/messaging/type/MessageEnteredLicense.h
new file mode 100644
index 00000000..6e538d39
--- /dev/null
+++ b/src/lib/utility/messaging/type/MessageEnteredLicense.h
@@ -0,0 +1,21 @@
+#ifndef MESSAGE_ENTERED_LICENSE_H
+#define MESSAGE_ENTERED_LICENSE_H
+
+#include "utility/messaging/Message.h"
+
+class MessageEnteredLicense
+	: public Message<MessageEnteredLicense>
+{
+public:
+	MessageEnteredLicense()
+	{
+		setSendAsTask(false);
+	}
+
+	static const std::string getStaticType()
+	{
+		return "MessageEnteredLicense";
+	}
+};
+
+#endif // MESSAGE_ENTERED_LICENSE_H
diff --git a/src/lib_gui/CMakeLists.txt b/src/lib_gui/CMakeLists.txt
index 8acd35ef..d3f52204 100644
--- a/src/lib_gui/CMakeLists.txt
+++ b/src/lib_gui/CMakeLists.txt
@@ -119,4 +119,7 @@ add_files(
 	qt/window/QtSplashScreen.h
 	qt/window/QtStartScreen.cpp
 	qt/window/QtStartScreen.h
+
+	qt/QtApplication.cpp
+	qt/QtApplication.h
 )
diff --git a/src/lib_gui/qt/QtApplication.cpp b/src/lib_gui/qt/QtApplication.cpp
new file mode 100644
index 00000000..821117cd
--- /dev/null
+++ b/src/lib_gui/qt/QtApplication.cpp
@@ -0,0 +1,30 @@
+#include "qt/QtApplication.h"
+
+#include <QFileOpenEvent>
+
+#include "utility/file/FilePath.h"
+#include "utility/messaging/type/MessageLoadProject.h"
+
+QtApplication::QtApplication(int& argc, char** argv)
+	: QApplication(argc, argv)
+{
+}
+
+// responds to FileOpenEvent specific for Mac
+bool QtApplication::event(QEvent *event)
+{
+	if (event->type() == QEvent::FileOpen)
+	{
+		QFileOpenEvent* fileEvent = dynamic_cast<QFileOpenEvent*>(event);
+
+		FilePath path(fileEvent->file().toStdString());
+
+		if (path.exists() && path.extension() == ".coatiproject")
+		{
+			MessageLoadProject(path.str(), false).dispatch();
+			return true;
+		}
+	}
+
+	return QApplication::event(event);
+}
diff --git a/src/lib_gui/qt/QtApplication.h b/src/lib_gui/qt/QtApplication.h
new file mode 100644
index 00000000..b0c53123
--- /dev/null
+++ b/src/lib_gui/qt/QtApplication.h
@@ -0,0 +1,15 @@
+#ifndef QT_APPLICATION_H
+#define QT_APPLICATION_H
+
+#include <QApplication>
+
+class QtApplication
+	: public QApplication
+{
+public:
+	QtApplication(int& argc, char** argv);
+
+	bool event(QEvent *event);
+};
+
+#endif // QT_APPLICATION_H
diff --git a/src/lib_gui/qt/view/QtMainView.cpp b/src/lib_gui/qt/view/QtMainView.cpp
index ca20595f..7105922e 100644
--- a/src/lib_gui/qt/view/QtMainView.cpp
+++ b/src/lib_gui/qt/view/QtMainView.cpp
@@ -5,7 +5,8 @@
 #include "qt/window/QtMainWindow.h"
 
 QtMainView::QtMainView()
-	: m_setTitleFunctor(std::bind(&QtMainView::doSetTitle, this, std::placeholders::_1))
+	: m_hideStartScreenFunctor(std::bind(&QtMainView::doHideStartScreen, this))
+	, m_setTitleFunctor(std::bind(&QtMainView::doSetTitle, this, std::placeholders::_1))
 	, m_activateWindowFunctor(std::bind(&QtMainView::doActivateWindow, this))
 	, m_updateRecentProjectMenuFunctor(std::bind(&QtMainView::doUpdateRecentProjectMenu, this))
 	, m_showLicenseScreenFunctor(std::bind(&QtMainView::doShowLicenseScreen, this))
@@ -69,7 +70,7 @@ void QtMainView::setStatusBar(QStatusBar* statusbar)
 
 void QtMainView::hideStartScreen()
 {
-	m_window->clearWindows();
+	m_hideStartScreenFunctor();
 }
 
 void QtMainView::setTitle(const std::string& title)
@@ -97,6 +98,11 @@ void QtMainView::doUpdateRecentProjectMenu()
 	m_window->updateRecentProjectMenu();
 }
 
+void QtMainView::doHideStartScreen()
+{
+	m_window->clearWindows();
+}
+
 void QtMainView::doSetTitle(const std::string& title)
 {
 	m_window->setWindowTitle(QString::fromStdString(title));
diff --git a/src/lib_gui/qt/view/QtMainView.h b/src/lib_gui/qt/view/QtMainView.h
index 1549e025..9864c24c 100644
--- a/src/lib_gui/qt/view/QtMainView.h
+++ b/src/lib_gui/qt/view/QtMainView.h
@@ -40,6 +40,7 @@ public:
 	virtual void showLicenseScreen();
 
 private:
+	void doHideStartScreen();
 	void doSetTitle(const std::string& title);
 	void doActivateWindow();
 	void doUpdateRecentProjectMenu();
@@ -48,6 +49,7 @@ private:
 	std::shared_ptr<QtMainWindow> m_window;
 	std::vector<View*> m_views;
 
+	QtThreadedFunctor<> m_hideStartScreenFunctor;
 	QtThreadedFunctor<const std::string&> m_setTitleFunctor;
 	QtThreadedFunctor<> m_activateWindowFunctor;
 	QtThreadedFunctor<> m_updateRecentProjectMenuFunctor;
diff --git a/src/lib_gui/qt/window/QtLicense.cpp b/src/lib_gui/qt/window/QtLicense.cpp
index 467d4ae9..9457f11c 100644
--- a/src/lib_gui/qt/window/QtLicense.cpp
+++ b/src/lib_gui/qt/window/QtLicense.cpp
@@ -12,8 +12,9 @@
 #include "PublicKey.h"
 #include "qt/utility/utilityQt.h"
 #include "settings/ApplicationSettings.h"
-#include "utility/file/FilePath.h"
 #include "utility/AppPath.h"
+#include "utility/file/FilePath.h"
+#include "utility/messaging/type/MessageEnteredLicense.h"
 #include "utility/ResourcePaths.h"
 
 QtLicense::QtLicense(QWidget *parent)
@@ -152,6 +153,8 @@ void QtLicense::handleUpdateButtonPress()
 		FilePath p(appLocation);
 		appSettings->setLicenseCheck(license.hashLocation(p.absolute().str()));
 		appSettings->save();
+
+		MessageEnteredLicense().dispatch();
 	}
 	else
 	{
diff --git a/src/lib_gui/qt/window/QtMainWindow.cpp b/src/lib_gui/qt/window/QtMainWindow.cpp
index cc7b1b38..87b753af 100644
--- a/src/lib_gui/qt/window/QtMainWindow.cpp
+++ b/src/lib_gui/qt/window/QtMainWindow.cpp
@@ -62,8 +62,6 @@ bool MouseReleaseFilter::eventFilter(QObject* obj, QEvent* event)
 	{
 		QMouseEvent* mouseEvent = dynamic_cast<QMouseEvent*>(event);
 
-
-
 		if (mouseEvent->button() == m_backButton)
 		{
 			MessageUndo().dispatch();
@@ -82,7 +80,6 @@ bool MouseReleaseFilter::eventFilter(QObject* obj, QEvent* event)
 MouseWheelFilter::MouseWheelFilter(QObject* parent)
 	: QObject(parent)
 {
-
 }
 
 bool MouseWheelFilter::eventFilter(QObject* obj, QEvent* event)
@@ -106,6 +103,7 @@ bool MouseWheelFilter::eventFilter(QObject* obj, QEvent* event)
 	return QObject::eventFilter(obj, event);
 }
 
+
 QtMainWindow::QtMainWindow()
 	: m_showDockWidgetTitleBars(true)
 {
@@ -300,9 +298,9 @@ void QtMainWindow::popWindow()
 
 void QtMainWindow::clearWindows()
 {
-	if (m_windowStack.size())
+	for (QWidget* window : m_windowStack)
 	{
-		m_windowStack.back()->hide();
+		window->hide();
 	}
 
 	m_windowStack.clear();
diff --git a/src/lib_gui/qt/window/QtMainWindow.h b/src/lib_gui/qt/window/QtMainWindow.h
index 869af972..e93042b3 100644
--- a/src/lib_gui/qt/window/QtMainWindow.h
+++ b/src/lib_gui/qt/window/QtMainWindow.h
@@ -63,6 +63,7 @@ protected:
 	bool eventFilter(QObject* obj, QEvent* event);
 };
 
+
 class QtMainWindow
 	: public QMainWindow
 {
diff --git a/src/trial/main.cpp b/src/trial/main.cpp
index 4b6daddd..10ed0da5 100644
--- a/src/trial/main.cpp
+++ b/src/trial/main.cpp
@@ -1,24 +1,20 @@
-#include <memory>
-
-#include <QApplication>
-
+#include "utility/AppPath.h"
 #include "utility/logging/ConsoleLogger.h"
 #include "utility/logging/FileLogger.h"
 #include "utility/logging/LogManager.h"
-#include "utility/AppPath.h"
 #include "utility/ResourcePaths.h"
 #include "utility/Version.h"
 
 #include "Application.h"
 #include "includes.h" // defines 'void setup(int argc, char *argv[])'
-#include "qt/window/QtMainWindow.h"
-#include "qt/window/QtSplashScreen.h"
 #include "qt/network/QtNetworkFactory.h"
+#include "qt/QtApplication.h"
 #include "qt/utility/utilityQt.h"
 #include "qt/view/QtViewFactory.h"
+#include "qt/window/QtMainWindow.h"
+#include "qt/window/QtSplashScreen.h"
 #include "version.h"
 
-#include "component/controller/helper/NetworkProtocolHelper.h" // remove when done
 
 void init()
 {
@@ -39,7 +35,7 @@ int main(int argc, char *argv[])
 	Version version = Version::fromString(GIT_VERSION_NUMBER);
 
 	setup(argc, argv);
-	QApplication qtApp(argc, argv);
+	QtApplication qtApp(argc, argv);
 
 	qtApp.setAttribute(Qt::AA_UseHighDpiPixmaps);