Index: sources/view/VBluetooth.cpp
===================================================================
diff -u -rfdb48ba3fba8e95027ebf573325c8f25db74c070 -readda1cc1ad9d62aecf6b0a8e64330fad438ee0d
--- sources/view/VBluetooth.cpp	(.../VBluetooth.cpp)	(revision fdb48ba3fba8e95027ebf573325c8f25db74c070)
+++ sources/view/VBluetooth.cpp	(.../VBluetooth.cpp)	(revision eadda1cc1ad9d62aecf6b0a8e64330fad438ee0d)
@@ -373,7 +373,7 @@
 {
     QJsonObject obj;
 
-    if (_lastSelectedDevice->isValid())
+    if (_lastSelectedDevice != NULL && _lastSelectedDevice->isValid())
     {
         QJsonObject subObj;
         subObj["Name"] = _lastSelectedDevice->getName();
@@ -384,6 +384,12 @@
     for (QList<QObject*>::iterator iter = _pairedDevices.begin(); iter != _pairedDevices.end(); ++iter)
         obj[((VBluetoothDeviceInfo*)(*iter))->getAddress()] = ((VBluetoothDeviceInfo*)(*iter))->getName();
 
+    if (obj.isEmpty())
+    {
+        LOG_DEBUG("No Bluetooth devices to save.");
+        return;
+    }
+
     QJsonDocument document(obj);
     emit didRequestConcurrentSave(path, document.toJson(), false);
 }