diff --git a/plugins/UM3NetworkPrinting/NetworkPrinterOutputDevice.py b/plugins/UM3NetworkPrinting/NetworkPrinterOutputDevice.py
index 7c58f2bb66..0dd31652ce 100755
--- a/plugins/UM3NetworkPrinting/NetworkPrinterOutputDevice.py
+++ b/plugins/UM3NetworkPrinting/NetworkPrinterOutputDevice.py
@@ -200,7 +200,7 @@ class NetworkPrinterOutputDevice(PrinterOutputDevice):
 
     def _onAuthenticationRequired(self, reply, authenticator):
         if self._authentication_id is not None and self._authentication_key is not None:
-            Logger.log("d", "Authentication was required. Setting up authenticator with ID %s and key", self._authentication_id, self._getSafeAuthKey())
+            Logger.log("d", "Authentication was required. Setting up authenticator with ID %s and key %s", self._authentication_id, self._getSafeAuthKey())
             authenticator.setUser(self._authentication_id)
             authenticator.setPassword(self._authentication_key)
         else:
@@ -1089,7 +1089,7 @@ class NetworkPrinterOutputDevice(PrinterOutputDevice):
 
                 self._authentication_key = data["key"]
                 self._authentication_id = data["id"]
-                Logger.log("i", "Got a new authentication ID (%s) and KEY (%S). Waiting for authorization.", self._authentication_id, self._getSafeAuthKey())
+                Logger.log("i", "Got a new authentication ID (%s) and KEY (%s). Waiting for authorization.", self._authentication_id, self._getSafeAuthKey())
 
                 # Check if the authentication is accepted.
                 self._checkAuthentication()
diff --git a/plugins/UM3NetworkPrinting/NetworkPrinterOutputDevicePlugin.py b/plugins/UM3NetworkPrinting/NetworkPrinterOutputDevicePlugin.py
index f39d921fff..9f450f21ab 100644
--- a/plugins/UM3NetworkPrinting/NetworkPrinterOutputDevicePlugin.py
+++ b/plugins/UM3NetworkPrinting/NetworkPrinterOutputDevicePlugin.py
@@ -164,8 +164,8 @@ class NetworkPrinterOutputDevicePlugin(OutputDevicePlugin):
             else:
                 if self._printers[key].isConnected():
                     Logger.log("d", "Closing connection [%s]..." % key)
-                    self._printers[key].connectionStateChanged.disconnect(self._onPrinterConnectionStateChanged)
                     self._printers[key].close()
+                    self._printers[key].connectionStateChanged.disconnect(self._onPrinterConnectionStateChanged)
 
     ##  Because the model needs to be created in the same thread as the QMLEngine, we use a signal.
     def addPrinter(self, name, address, properties):
@@ -183,9 +183,9 @@ class NetworkPrinterOutputDevicePlugin(OutputDevicePlugin):
         printer = self._printers.pop(name, None)
         if printer:
             if printer.isConnected():
+                printer.disconnect()
                 printer.connectionStateChanged.disconnect(self._onPrinterConnectionStateChanged)
                 Logger.log("d", "removePrinter, disconnecting [%s]..." % name)
-                printer.disconnect()
         self.printerListChanged.emit()
 
     ##  Handler for when the connection state of one of the detected printers changes
diff --git a/resources/qml/AskOpenAsProjectOrModelsDialog.qml b/resources/qml/AskOpenAsProjectOrModelsDialog.qml
index e298ccb64f..a3879bb8ac 100644
--- a/resources/qml/AskOpenAsProjectOrModelsDialog.qml
+++ b/resources/qml/AskOpenAsProjectOrModelsDialog.qml
@@ -6,6 +6,7 @@ import QtQuick.Controls 1.1
 import QtQuick.Controls.Styles 1.1
 import QtQuick.Layouts 1.1
 import QtQuick.Dialogs 1.1
+import QtQuick.Window 2.1
 
 import UM 1.3 as UM
 import Cura 1.0 as Cura
@@ -17,13 +18,13 @@ UM.Dialog
     id: base
 
     title: catalog.i18nc("@title:window", "Open project file")
-    width: 420
-    height: 140
+    width: 450 * Screen.devicePixelRatio
+    height: 150 * Screen.devicePixelRatio
 
     maximumHeight: height
     maximumWidth: width
-    minimumHeight: height
-    minimumWidth: width
+    minimumHeight: maximumHeight
+    minimumWidth: maximumWidth
 
     modality: UM.Application.platform == "linux" ? Qt.NonModal : Qt.WindowModal;
 
@@ -60,15 +61,16 @@ UM.Dialog
     Column
     {
         anchors.fill: parent
-        anchors.margins: UM.Theme.getSize("default_margin").width
-        anchors.left: parent.left
-        anchors.right: parent.right
-        spacing: UM.Theme.getSize("default_margin").width
+        anchors.leftMargin: 20 * Screen.devicePixelRatio
+        anchors.rightMargin: 20 * Screen.devicePixelRatio
+        anchors.bottomMargin: 20 * Screen.devicePixelRatio
+        spacing: 10 * Screen.devicePixelRatio
 
         Label
         {
-            text: catalog.i18nc("@text:window", "This is a Cura project file. Would you like to open it as a project\nor import the models from it?")
-            anchors.margins: UM.Theme.getSize("default_margin").width
+            text: catalog.i18nc("@text:window", "This is a Cura project file. Would you like to open it as a project or import the models from it?")
+            anchors.left: parent.left
+            anchors.right: parent.right
             font: UM.Theme.getFont("default")
             wrapMode: Text.WordWrap
         }
@@ -77,7 +79,6 @@ UM.Dialog
         {
             id: rememberChoiceCheckBox
             text: catalog.i18nc("@text:window", "Remember my choice")
-            anchors.margins: UM.Theme.getSize("default_margin").width
             checked: UM.Preferences.getValue("cura/choice_on_open_project") != "always_ask"
         }
 
@@ -93,7 +94,7 @@ UM.Dialog
                 id: openAsProjectButton
                 text: catalog.i18nc("@action:button", "Open as project");
                 anchors.right: importModelsButton.left
-                anchors.rightMargin: UM.Theme.getSize("default_margin").width
+                anchors.rightMargin: UM.Theme.getSize("default_margin").width * Screen.devicePixelRatio
                 isDefault: true
                 onClicked:
                 {