Fix run time errors

[mpostol]

Describe the bug

The application doesn't run.

Exception

System.Windows.Markup.XamlParseException
  HResult=0x80131501
  Message=Cannot convert string '/HelpAssistantGui;component/Resources/HAicon.png' in attribute 'Icon' to object of type 'System.Windows.Media.ImageSource'. Could not load file or assembly 'HelpAssistantGui, Culture=neutral' or one of its dependencies. The system cannot find the file specified.  Error at object 'HelpAssistantGui.HelpAssistantWindow' in markup file 'CAS.MAML.HelpAssistant.Guii;component/windowhelpassistantgui.xaml' Line 21 Position 134.
  Source=<Cannot evaluate the exception source>
  StackTrace:
<Cannot evaluate the exception stack trace>

Inner Exception 1:
FileNotFoundException: Could not load file or assembly 'HelpAssistantGui, Culture=neutral' or one of its dependencies. The system cannot find the file specified.