diff --git a/samples/blackgui/guimodeenums.h b/samples/blackgui/guimodeenums.h
index 0ac568c6a..dce6638d6 100644
--- a/samples/blackgui/guimodeenums.h
+++ b/samples/blackgui/guimodeenums.h
@@ -23,7 +23,7 @@ public:
     enum CoreMode {
         CoreInGuiProcess,
         CoreExternal,
-        CoreExternalVoiceLocal
+        CoreExternalAudioLocal
     };
 };
 
diff --git a/samples/blackgui/infowindow.cpp b/samples/blackgui/infowindow.cpp
index 755fa0d80..fe94b772e 100644
--- a/samples/blackgui/infowindow.cpp
+++ b/samples/blackgui/infowindow.cpp
@@ -3,6 +3,7 @@
 #include <QTimer>
 #include <QDesktopWidget>
 
+
 /*
  * Constructor
  */
diff --git a/samples/blackgui/introwindow.cpp b/samples/blackgui/introwindow.cpp
index d678f2287..b0a2acd0b 100644
--- a/samples/blackgui/introwindow.cpp
+++ b/samples/blackgui/introwindow.cpp
@@ -1,5 +1,7 @@
 #include "introwindow.h"
 #include "ui_introwindow.h"
+#include "blackcore/dbus_server.h"
+#include "blackmisc/networkutils.h"
 #include <QDesktopServices>
 #include <QUrl>
 
@@ -12,6 +14,10 @@ CIntroWindow::CIntroWindow(QWidget *parent) :
 {
     ui->setupUi(this);
     this->layout()->setSizeConstraint(QLayout::SetFixedSize);
+    this->ui->cb_DBusServer->addItem(BlackCore::CDBusServer::sessionDBusServer());
+    this->ui->cb_DBusServer->addItem(BlackCore::CDBusServer::systemDBusServer());
+    this->ui->cb_DBusServer->addItems(BlackMisc::CNetworkUtils::getKnownIpAddresses());
+    this->ui->cb_DBusServer->setCurrentIndex(0);
 }
 
 /*
@@ -24,10 +30,10 @@ CIntroWindow::~CIntroWindow() { }
  */
 GuiModes::WindowMode CIntroWindow::getWindowMode() const
 {
-    if (this->ui->rb_WindowNormal->isChecked()) return GuiModes::WindowNormal;
-    if (this->ui->rb_WindowFrameless->isChecked()) return GuiModes::WindowFrameless;
-    qFatal("Illegal GUI status (window mode");
-    return GuiModes::WindowNormal; // just for compiler warning
+    if (this->ui->rb_WindowFrameless->isChecked())
+        return GuiModes::WindowFrameless;
+    else
+        return GuiModes::WindowNormal;
 }
 
 /*
@@ -35,13 +41,20 @@ GuiModes::WindowMode CIntroWindow::getWindowMode() const
  */
 GuiModes::CoreMode CIntroWindow::getCoreMode() const
 {
-    if (this->ui->rb_CoreExternal->isChecked())return GuiModes::CoreExternal;
-    if (this->ui->rb_CoreExternalVoiceLocal->isChecked()) return GuiModes::CoreExternalVoiceLocal;
-    if (this->ui->rb_CoreInGuiProcess->isChecked()) return GuiModes::CoreInGuiProcess;
-    qFatal("Illegal GUI status (core mode");
-    return GuiModes::CoreExternal; // just for compiler warning
+    if (this->ui->rb_CoreExternalVoiceLocal->isChecked())
+        return GuiModes::CoreExternalAudioLocal;
+    else if (this->ui->rb_CoreInGuiProcess->isChecked())
+        return GuiModes::CoreInGuiProcess;
+    else
+        return GuiModes::CoreExternal;
+}
+/*
+ * DBus server address
+ */
+QString CIntroWindow::getDBusAddress() const
+{
+    return this->ui->cb_DBusServer->currentText();
 }
-
 
 /*
  * Button clicked
diff --git a/samples/blackgui/introwindow.h b/samples/blackgui/introwindow.h
index 7fb9c38f0..81011281d 100644
--- a/samples/blackgui/introwindow.h
+++ b/samples/blackgui/introwindow.h
@@ -20,33 +20,23 @@ class CIntroWindow : public QDialog
     Q_OBJECT
 
 public:
-    /*!
-     * \brief Constructor
-     * \param parent widget
-     */
+    //! \brief Constructor
     explicit CIntroWindow(QWidget *parent = nullptr);
 
-    /*!
-     * Destructor
-     */
+    //! Destructor
     ~CIntroWindow();
 
-    /*!
-     * \brief Selected window mode
-     * \see GuiModes::WindowMode
-     */
+    //! Selected window mode
     GuiModes::WindowMode getWindowMode() const;
 
-    /*!
-     * \brief Get core mode
-     * \see GuiModes::CoreMode
-     */
+    //! Get core mode
     GuiModes::CoreMode getCoreMode() const;
 
+    //! select DBus address/mode
+    QString getDBusAddress() const;
+
 private slots:
-    /*!
-     * \brief Button has been clicked
-     */
+    //! Button has been clicked
     void buttonClicked() const;
 
 private:
diff --git a/samples/blackgui/introwindow.ui b/samples/blackgui/introwindow.ui
index 557f2bfcb..b084677fc 100644
--- a/samples/blackgui/introwindow.ui
+++ b/samples/blackgui/introwindow.ui
@@ -6,8 +6,8 @@
    <rect>
     <x>0</x>
     <y>0</y>
-    <width>239</width>
-    <height>260</height>
+    <width>250</width>
+    <height>300</height>
    </rect>
   </property>
   <property name="windowTitle">
@@ -26,14 +26,14 @@
 }
 
 QPushButton {
-        background-color: rgba(255, 255, 0, 175);
-		color: black;
-        border-style: solid;
-        border-width:1px;
-        border-radius: 5px;
-        border-color: green;
-		margin: 3px;
-		padding: 3px;
+	background-color: rgba(255, 255, 0, 175);
+	color: black;
+	border-style: solid;
+	border-width:1px;
+	border-radius: 5px;
+	border-color: green;
+	margin: 3px;
+	padding: 3px;
 }
 
 QRadioButton {
@@ -46,19 +46,22 @@ QGroupBox {
     margin-top: 2ex; /* leave space at the top for the title */
 }
 
+QComboBox {
+	background-color: black;
+	border: 1px solid yellow;
+}
 
  QGroupBox::title {
-     subcontrol-origin: margin;
-     subcontrol-position: top left; /* position at the top center */
-     padding: 0 0px;
+	subcontrol-origin: margin;
+	subcontrol-position: top left; /* position at the top center */
+	padding: 0 0px;
 	margin: 0px;
-     background-color: black;
+	background-color: black;
  }
 
 #lbl_Icon {
 	max-height: 128;
 	max-width: 128;
-
 }</string>
   </property>
   <property name="sizeGripEnabled">
@@ -185,7 +188,14 @@ voice included</string>
          </widget>
         </item>
         <item>
-         <spacer name="verticalSpacer">
+         <widget class="QPushButton" name="pb_DeleteSettingsFile">
+          <property name="text">
+           <string>del.settings</string>
+          </property>
+         </widget>
+        </item>
+        <item>
+         <spacer name="vs_InfoSpacer">
           <property name="orientation">
            <enum>Qt::Vertical</enum>
           </property>
@@ -200,6 +210,27 @@ voice included</string>
        </layout>
       </widget>
      </item>
+     <item row="2" column="0" colspan="2">
+      <layout class="QFormLayout" name="formLayout">
+       <item row="0" column="0">
+        <widget class="QLabel" name="lbl_DBusServer">
+         <property name="text">
+          <string>DBus server</string>
+         </property>
+        </widget>
+       </item>
+       <item row="0" column="1">
+        <widget class="QComboBox" name="cb_DBusServer">
+         <property name="editable">
+          <bool>true</bool>
+         </property>
+         <property name="insertPolicy">
+          <enum>QComboBox::InsertAtTop</enum>
+         </property>
+        </widget>
+       </item>
+      </layout>
+     </item>
     </layout>
    </item>
    <item>
diff --git a/samples/blackgui/main.cpp b/samples/blackgui/main.cpp
index 4a58d5171..fa63cad92 100644
--- a/samples/blackgui/main.cpp
+++ b/samples/blackgui/main.cpp
@@ -1,6 +1,7 @@
 #include "introwindow.h"
 #include "mainwindow.h"
 #include "guimodeenums.h"
+#include "blackcore/context_runtime_config.h"
 #include "blackmisc/blackmiscfreefunctions.h"
 #include <QtGlobal>
 #include <QApplication>
@@ -39,6 +40,7 @@ int main(int argc, char *argv[])
 
     // Dialog to decide external or internal core
     CIntroWindow intro;
+    BlackCore::CRuntimeConfig runtimeConfig;
     if (intro.exec() == QDialog::Rejected)
     {
         return 0;
@@ -47,13 +49,26 @@ int main(int argc, char *argv[])
     {
         coreMode = intro.getCoreMode();
         windowMode = intro.getWindowMode();
+        QString dbusAddress = BlackCore::CDBusServer::fixAddressToDBusAddress(intro.getDBusAddress());
+        switch (windowMode)
+        {
+        case GuiModes::CoreExternal:
+            runtimeConfig =  BlackCore::CRuntimeConfig::remote(dbusAddress);
+            break;
+        case GuiModes::CoreInGuiProcess:
+            runtimeConfig =  BlackCore::CRuntimeConfig::local(dbusAddress);
+            break;
+        case GuiModes::CoreExternalAudioLocal:
+            runtimeConfig =  BlackCore::CRuntimeConfig::remoteLocalAudio(dbusAddress);
+            break;
+        }
     }
     intro.close();
 
     // show window
     MainWindow w(windowMode);
     w.show();
-    w.init(coreMode); // object is complete by now
+    w.init(runtimeConfig); // object is complete by now
     int r = a.exec();
     return r;
 }
diff --git a/samples/blackgui/mainwindow.cpp b/samples/blackgui/mainwindow.cpp
index eb6371d0b..4c7c08ae5 100644
--- a/samples/blackgui/mainwindow.cpp
+++ b/samples/blackgui/mainwindow.cpp
@@ -31,7 +31,6 @@ MainWindow::MainWindow(GuiModes::WindowMode windowMode, QWidget *parent) :
     m_modelAtcListOnline(nullptr), m_modelAtcListBooked(nullptr), m_modelTrafficServerList(nullptr), m_modelAircraftsInRange(nullptr),
     m_modelAllUsers(nullptr), m_modelUsersVoiceCom1(nullptr), m_modelUsersVoiceCom2(nullptr), m_modelSettingsHotKeys(nullptr),
     // contexts and runtime
-    m_coreMode(GuiModes::CoreExternal),
     m_coreAvailable(false), m_contextNetworkAvailable(false), m_contextAudioAvailable(false),
 
     // timers
@@ -404,7 +403,9 @@ void MainWindow::updateGuiStatusInformation()
     QString network("unavailable");
     if (this->m_contextNetworkAvailable)
     {
-        network = this->m_rt->getIContextNetwork()->usingLocalObjects() ? "local" : now;
+        bool dbus = !this->m_rt->getIContextNetwork()->usingLocalObjects();
+        network =  dbus ? now : "local";
+        this->ui->cb_StatusWithDBus->setChecked(dbus);
     }
 
     // handle voice, mute
@@ -423,7 +424,6 @@ void MainWindow::updateGuiStatusInformation()
     // update status fields
     this->ui->le_StatusNetworkContext->setText(network);
     this->ui->le_StatusAudioContext->setText(voice);
-    this->ui->cb_StatusWithDBus->setCheckState(this->m_coreMode ? Qt::Checked : Qt::Unchecked);
 
     // Connected button
     if (this->m_contextNetworkAvailable && this->m_rt->getIContextNetwork()->isConnected())
diff --git a/samples/blackgui/mainwindow.h b/samples/blackgui/mainwindow.h
index 3718e7b33..60852d5aa 100644
--- a/samples/blackgui/mainwindow.h
+++ b/samples/blackgui/mainwindow.h
@@ -54,7 +54,7 @@ public:
     ~MainWindow();
 
     //! Init data
-    void init(GuiModes::CoreMode coreMode);
+    void init(const BlackCore::CRuntimeConfig &runtimeConfig);
 
     //! Graceful shutdown
     void gracefulShutdown();
@@ -112,7 +112,6 @@ private:
     BlackGui::CKeyboardKeyListModel *m_modelSettingsHotKeys;
 
     // contexts
-    GuiModes::CoreMode m_coreMode;
     bool m_coreAvailable;
     bool m_contextNetworkAvailable;
     bool m_contextAudioAvailable;
diff --git a/samples/blackgui/mainwindow_init.cpp b/samples/blackgui/mainwindow_init.cpp
index 8e62a791e..738bcb2b2 100644
--- a/samples/blackgui/mainwindow_init.cpp
+++ b/samples/blackgui/mainwindow_init.cpp
@@ -27,10 +27,9 @@ using namespace BlackGui;
 /*
  * Init data
  */
-void MainWindow::init(GuiModes::CoreMode coreMode)
+void MainWindow::init(const CRuntimeConfig &runtimeConfig)
 {
     if (this->m_init) return;
-    this->m_coreMode = coreMode;
 
     // with frameless window, we shift menu and statusbar into central widget
     // http://stackoverflow.com/questions/18316710/frameless-and-transparent-window-qt5
@@ -168,11 +167,7 @@ void MainWindow::init(GuiModes::CoreMode coreMode)
     if (this->m_timerSimulator == nullptr) this->m_timerSimulator = new QTimer(this);
 
     // context
-    this->m_rt.reset(
-        this->m_coreMode != GuiModes::CoreInGuiProcess ?
-        new CRuntime(CRuntimeConfig::remote(), this) :
-        new CRuntime(CRuntimeConfig::local(), this)
-    );
+    this->m_rt.reset(new CRuntime(runtimeConfig, this));
 
     // wire GUI signals
     this->initGuiSignals();