diff --git a/src/app/tape/dialogs/dialogmdatabase.cpp b/src/app/tape/dialogs/dialogmdatabase.cpp
index 3ebd1a7e4..8f131e39d 100644
--- a/src/app/tape/dialogs/dialogmdatabase.cpp
+++ b/src/app/tape/dialogs/dialogmdatabase.cpp
@@ -52,9 +52,9 @@ DialogMDataBase::DialogMDataBase(QWidget *parent)
       list()
 
 {
+    ui->setupUi(this);
     InitDataBase();
 
-    connect(ui->treeWidget, &QTreeWidget::itemChanged, this, &DialogMDataBase::UpdateChecks);
     connect(ui->treeWidget, &QTreeWidget::itemClicked, this, &DialogMDataBase::ShowDescription);
 }
 
@@ -635,9 +635,9 @@ void DialogMDataBase::AddMeasurement(QTreeWidgetItem *group, const QString &name
         {
             m->setCheckState(0, Qt::Unchecked);
         }
-    }
 
-    UpdateChecks(m, 0);
+        UpdateChecks(m, 0);
+    }
 
     const QString text = qApp->TrVars()->MNumber(name) + ". " + qApp->TrVars()->MToUser(name);
     m->setText(0, text);
diff --git a/src/app/tape/mapplication.cpp b/src/app/tape/mapplication.cpp
index f95bda3db..438662286 100644
--- a/src/app/tape/mapplication.cpp
+++ b/src/app/tape/mapplication.cpp
@@ -36,13 +36,15 @@
 #include <QLocalSocket>
 #include <QResource>
 #include <QTranslator>
+#include <QPointer>
 
 //---------------------------------------------------------------------------------------------------------------------
 MApplication::MApplication(int &argc, char **argv)
     :VAbstractApplication(argc, argv),
       mainWindows(),
       localServer(nullptr),
-      trVars(nullptr)
+      trVars(nullptr),
+      dataBase(QPointer<DialogMDataBase>())
 {
     setApplicationDisplayName(VER_PRODUCTNAME_STR);
     setApplicationName(VER_INTERNALNAME_STR);
@@ -292,6 +294,22 @@ QString MApplication::diagramsPath() const
 #endif
 }
 
+//---------------------------------------------------------------------------------------------------------------------
+void MApplication::ShowDataBase()
+{
+    if (dataBase.isNull())
+    {
+        dataBase = new DialogMDataBase();
+        dataBase->setAttribute(Qt::WA_DeleteOnClose, true);
+        dataBase->setModal(false);
+        dataBase->show();
+    }
+    else
+    {
+        dataBase->activateWindow();
+    }
+}
+
 //---------------------------------------------------------------------------------------------------------------------
 #if defined(Q_WS_MAC)
 bool MApplication::event(QEvent* event)
diff --git a/src/app/tape/mapplication.h b/src/app/tape/mapplication.h
index 8bf1be478..71700b8de 100644
--- a/src/app/tape/mapplication.h
+++ b/src/app/tape/mapplication.h
@@ -33,6 +33,7 @@
 #include "../vmisc/def.h"
 #include "../vmisc/vtapesettings.h"
 #include "../vmisc/vabstractapplication.h"
+#include "dialogs/dialogmdatabase.h"
 
 class MApplication;// use in define
 class TMainWindow;
@@ -70,6 +71,8 @@ public:
     QString translationsPath() const;
     QString diagramsPath() const;
 
+    void ShowDataBase();
+
 public slots:
     TMainWindow *NewMainWindow();
 
@@ -82,6 +85,7 @@ private:
     QList<QPointer<TMainWindow> > mainWindows;
     QLocalServer *localServer;
     VTranslateVars *trVars;
+    QPointer<DialogMDataBase> dataBase;
 
     void Clean();
 };
diff --git a/src/app/tape/tmainwindow.cpp b/src/app/tape/tmainwindow.cpp
index e288a1d36..addb5bb96 100644
--- a/src/app/tape/tmainwindow.cpp
+++ b/src/app/tape/tmainwindow.cpp
@@ -1135,6 +1135,7 @@ void TMainWindow::SetupMenu()
     // Measurements
     connect(ui->actionAddCustom, &QAction::triggered, this, &TMainWindow::AddCustom);
     connect(ui->actionAddKnown, &QAction::triggered, this, &TMainWindow::AddKnown);
+    connect(ui->actionDatabase, &QAction::triggered, qApp, &MApplication::ShowDataBase);
 
     // Window
     connect(ui->menuWindow, &QMenu::aboutToShow, this, &TMainWindow::AboutToShowWindowMenu);
diff --git a/src/app/tape/tmainwindow.ui b/src/app/tape/tmainwindow.ui
index 2a3c24d58..d22121cc8 100644
--- a/src/app/tape/tmainwindow.ui
+++ b/src/app/tape/tmainwindow.ui
@@ -615,6 +615,7 @@
     </property>
     <addaction name="actionAddKnown"/>
     <addaction name="actionAddCustom"/>
+    <addaction name="actionDatabase"/>
    </widget>
    <addaction name="menuFile"/>
    <addaction name="menuMeasurements"/>
@@ -784,6 +785,14 @@
     <string>Open template</string>
    </property>
   </action>
+  <action name="actionDatabase">
+   <property name="text">
+    <string>Database</string>
+   </property>
+   <property name="toolTip">
+    <string>Show information about all known measurement</string>
+   </property>
+  </action>
  </widget>
  <layoutdefault spacing="6" margin="11"/>
  <resources>