create dest directory if not exists

ModpackUpdater/UpdateInstaller.vb

@@ -173,6 +173,7 @@ Public Class UpdateInstaller
 
                 Select Case action.Type
                     Case UpdateActionType.Update
+                        Directory.CreateDirectory(Path.GetDirectoryName(destFilePath))
                         Dim sRemote As Stream = Await httpClient.GetStreamAsync(action.DownloadUrl)
                         Dim fs As New FileStream(destFilePath, FileMode.Create, FileAccess.ReadWrite)
                         Await sRemote.CopyToAsync(fs)
@@ -185,11 +186,13 @@ Public Class UpdateInstaller
                     Case UpdateActionType.Copy
                         Dim srcFilePath As String = Path.Combine(localPath, action.SrcPath)
                         If File.Exists(srcFilePath) Then
+                            Directory.CreateDirectory(Path.GetDirectoryName(destFilePath))
                             File.Copy(srcFilePath, destFilePath, True)
                         End If
                     Case UpdateActionType.Move
                         Dim srcFilePath As String = Path.Combine(localPath, action.SrcPath)
                         If File.Exists(srcFilePath) Then
+                            Directory.CreateDirectory(Path.GetDirectoryName(destFilePath))
                             File.Move(srcFilePath, destFilePath, True)
                         End If
                 End Select