First create solution

Nuvolar.Module.Win/WinModule.vb

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+Imports System
+Imports System.Text
+Imports System.Collections.Generic
+Imports System.ComponentModel
+
+Imports DevExpress.ExpressApp
+Imports DevExpress.ExpressApp.FileAttachments.Win
+Imports DevExpress.ExpressApp.DC
+
+<ToolboxItemFilter("Xaf.Platform.Win")> _
+Partial Public NotInheritable Class [NuvolarWindowsFormsModule]
+    Inherits ModuleBase
+    Public Sub New()
+        InitializeComponent()
+        exontrol.EXG2ANTTLib.exg2antt.RuntimeKey = "kxcp0u|cdqBuku/tgpfu|gtjc|0jw"
+    End Sub
+    'Public Overrides Sub CustomizeLogics(customLogics As DevExpress.ExpressApp.DC.CustomLogics)
+    '    MyBase.CustomizeLogics(customLogics)
+    '    customLogics.RegisterLogic(GetType(IModelOptionsFileAttachment), GetType(LogicIModelOptionsFileAttachment))
+
+    'End Sub
+End Class
+<DomainLogic(GetType(IModelOptionsFileAttachment))> _
+Public Class LogicIModelOptionsFileAttachment
+    Public Shared Function Get_DefaultDirectory(instance As IModelOptionsFileAttachment) As String
+        Return "c:\Temp"
+    End Function
+End Class
+