diff --git a/docs/UserManual/VideoTutorials/tutorial.mp4 b/docs/UserManual/VideoTutorials/tutorial.mp4
index aa1f5da5..beb55fee 100644
Binary files a/docs/UserManual/VideoTutorials/tutorial.mp4 and b/docs/UserManual/VideoTutorials/tutorial.mp4 differ
diff --git a/easyDiffractionApp/Gui/Components/ApplicationWindow.qml b/easyDiffractionApp/Gui/Components/ApplicationWindow.qml
index 4b425a1f..13cee14f 100644
--- a/easyDiffractionApp/Gui/Components/ApplicationWindow.qml
+++ b/easyDiffractionApp/Gui/Components/ApplicationWindow.qml
@@ -320,4 +320,14 @@ EaComponents.ApplicationWindow {
         }
     }
 
+    ///////////////
+    // Init dialogs
+    ///////////////
+
+    // Application dialogs (invisible at the beginning)
+    ExProjectPage.AboutDialog {
+        x: (parent.width - width) * 0.5
+        y: (parent.height - height) * 0.5
+
+    }
 }
diff --git a/easyDiffractionApp/Gui/Globals/Constants.qml b/easyDiffractionApp/Gui/Globals/Constants.qml
index 8c2420eb..73c353d3 100644
--- a/easyDiffractionApp/Gui/Globals/Constants.qml
+++ b/easyDiffractionApp/Gui/Globals/Constants.qml
@@ -16,6 +16,11 @@ QtObject {
     readonly property string appVersion: EaGlobals.Variables.projectConfig.tool.poetry.version
     readonly property string appDate: new Date().toISOString().slice(0,10) // TODO: Get from phython logic formatted as "9 Apr 2020"
     readonly property string appLogo: Qt.resolvedUrl("../Resources/Logo/App.svg")
-
+    readonly property string appUrl: "https://github.com/easyScience/easyDiffractionApp"
+    readonly property string essLogo: Qt.resolvedUrl("../Resources/Logo/ESSlogo.png")
+    readonly property string eulaUrl: "https://raw.githubusercontent.com/easyScience/easyDiffractionApp/master/LICENSE.md"
+    readonly property string oslUrl: "https://raw.githubusercontent.com/easyScience/easyDiffractionApp/master/externalLicences.md"
+    readonly property string description: "easyDiffraction is a scientific software for\n modelling and analysis of neutron diffraction data.\n\n" +
+    "easyDiffraction is build by ESS DMSC in\n Copenhagen, Denmark."
     readonly property int sampleScale: 100
 }
diff --git a/easyDiffractionApp/Gui/Pages/Home/MainContent.qml b/easyDiffractionApp/Gui/Pages/Home/MainContent.qml
index 7a259182..784c8d04 100644
--- a/easyDiffractionApp/Gui/Pages/Home/MainContent.qml
+++ b/easyDiffractionApp/Gui/Pages/Home/MainContent.qml
@@ -81,8 +81,10 @@ Item {
                 spacing: EaStyle.Sizes.fontPixelSize
 
                 EaElements.Button {
-                    enabled: false
+                    enabled: true
+                    id: aboutButton
                     text: qsTr("About %1".arg(ExGlobals.Constants.appName))
+                    onClicked: EaGlobals.Variables.showAppAboutDialog = true
                 }
                 EaElements.Button {
                     enabled: false
diff --git a/easyDiffractionApp/Gui/Pages/Project/AboutDialog.qml b/easyDiffractionApp/Gui/Pages/Project/AboutDialog.qml
new file mode 100644
index 00000000..58529a8d
--- /dev/null
+++ b/easyDiffractionApp/Gui/Pages/Project/AboutDialog.qml
@@ -0,0 +1,25 @@
+import QtQuick 2.13
+
+import easyAppGui.Globals 1.0 as EaGlobals
+import easyAppGui.Components 1.0 as EaComponents
+
+import Gui.Globals 1.0 as ExGlobals
+
+EaComponents.AboutDialog {
+    visible: EaGlobals.Variables.showAppAboutDialog
+    onClosed: EaGlobals.Variables.showAppAboutDialog = false
+
+
+    Component.onCompleted: {
+        appIconPath = ExGlobals.Constants.appLogo
+        essIconPath = ExGlobals.Constants.essLogo
+        eulaUrl = ExGlobals.Constants.eulaUrl
+        oslUrl = ExGlobals.Constants.oslUrl
+        appUrl = ExGlobals.Constants.appUrl
+        appPrefixName = ExGlobals.Constants.appPrefixName
+        appSuffixName = ExGlobals.Constants.appSuffixName
+        description = ExGlobals.Constants.description
+        appVersion = ExGlobals.Constants.appVersion
+        appDate = ExGlobals.Constants.appDate
+    }
+}
diff --git a/easyDiffractionApp/Gui/Pages/Project/qmldir b/easyDiffractionApp/Gui/Pages/Project/qmldir
index 65b8a8e1..989d6d40 100644
--- a/easyDiffractionApp/Gui/Pages/Project/qmldir
+++ b/easyDiffractionApp/Gui/Pages/Project/qmldir
@@ -1,5 +1,7 @@
 module Project
 
+AboutDialog 1.0 AboutDialog.qml
+
 MainContentTextView 1.0 MainContentTextView.qml
 MainContentDescription 1.0 MainContentDescription.qml
 
diff --git a/easyDiffractionApp/Gui/Resources/Logo/ESSlogo.png b/easyDiffractionApp/Gui/Resources/Logo/ESSlogo.png
new file mode 100644
index 00000000..9754fe3b
Binary files /dev/null and b/easyDiffractionApp/Gui/Resources/Logo/ESSlogo.png differ
diff --git a/externalLicenses.md b/externalLicenses.md
new file mode 100644
index 00000000..35659500
--- /dev/null
+++ b/externalLicenses.md
@@ -0,0 +1,24 @@
+# External Open Source Dependencies
+
+The following Open Source projects are used in easyDiffraction (_if there are any issues with licensing, please contact us via https://easydiffraction.org/contact.html_):
+
+## Fonts
+
+Encode Sans - https://fonts.google.com/specimen/Encode+Sans - Open Font Licence
+Encode Sans Condensed - https://fonts.google.com/specimen/Encode+Sans+Condensed - Open Font Licence
+Encode Sans Expanded - https://fonts.google.com/specimen/Encode+Sans+Expanded - Open Font Licence
+PT Sans - https://fonts.google.com/specimen/PT+Sans - Open Font Licence
+PT Mono - https://fonts.google.com/specimen/PT+Mono - Open Font Licence
+
+## Icons
+
+fontAwsome - https://github.com/FortAwesome/Font-Awesome - Creatice Commons 4.0 Licence
+
+## Computational libraries
+
+GSASII - https://raw.githubusercontent.com/easyScience/libsLinux/main/libsLinux/GSASII/license2013.txt
+CrysFML - https://raw.githubusercontent.com/easyScience/libsLinux/main/libsLinux/CFML_api/LICENSE
+
+## Python Modules
+
+Module information can be found at https://app.fossa.com/attribution/ef7a4b12-0ea0-4c0e-a77a-791b5f307327