I've been evaluating the 13.7.16.12 version further today and found an exception in code that works fine in my licensed copy. When the user clicks on the OptionsButton on a popup notify an exception happens indicating:

{"Unable to cast object of type 'Nevron.UI.NCaptionContent' to type 'Nevron.Dom.INElement'."}

at Nevron.UI.NUIElementContainer.GetChildFromId(Int32 id)
at Nevron.UI.WinForm.Controls.l11IIIl1.DisplayOptions()
at Nevron.UI.WinForm.Controls.l11IIIl1.OnCaptionButtonItemClick(Object sender, NUIItemEventArgs e)
at Nevron.UI.NCaptionElement.OnButtonItemClick(NCaptionButtonItem item)
at Nevron.UI.NCaptionButtonItem.OnClick(EventArgs e)
at Nevron.UI.NMouseInputElement.Nevron.UI.INMouseInputElement.OnMouseUp(NMouseEventArgs e)
at Nevron.UI.NUIElementContainer.ProcessMouseUp(NMouseEventArgs e)
at Nevron.UI.NMouseInputElement.Nevron.UI.INMouseInputElement.OnMouseUp(NMouseEventArgs e)
at Nevron.UI.WinForm.NUIElementHostImpl.OnMouseUp(MouseEventArgs e)
at Nevron.UI.WinForm.NUIElementHost.OnMouseUp(MouseEventArgs e)

With the code below the options button shows up but when the user clicks on it the exception happens as indicated above:

NPopupNotify p = new NPopupNotify();
p.PredefinedStyle = PredefinedPopupStyle.Skinned;
p.Caption.Content.Text = "my title";
NImageAndTextItem content = p.Content;
content.TextMargins = new NPadding(0, 4, 0, 0);
content.Text = "my message";
PopupAnimation animation = PopupAnimation.Fade | PopupAnimation.Slide;
p.AutoHide = true;
p.VisibleSpan = 5000;
p.Opacity = 255;
p.Animation = animation;
p.AnimationDirection = PopupAnimationDirection.Automatic;
p.VisibleOnMouseOver = true;
p.FullOpacityOnMouseOver = true;
p.AnimationInterval = 20;
p.AnimationSteps = 20;
p.OptionsButton = true;
NCommand cmd = new NCommand();
cmd.Properties.Text = "my menu item";
cmd.Properties.Style = CommandStyle.Text;
cmd.Click += new CommandEventHandler(cmd_Click);
cmd.Properties.Tag = p;
p.OptionsCommands.Add(cmd);
p.Show();


Also, I can reproduce this exception when using the Nevron UI Examples for C# "Popup Notify" example.