minor code improvements

ModpackUpdater.Model/UpdateConfig.vb

@@ -1,6 +1,6 @@
 Imports System.IO
 
-Imports Newtonsoft.Json.Linq
+Imports Newtonsoft.Json
 
 Imports Pilz.Cryptography
 
@@ -11,12 +11,12 @@ Public Class UpdateConfig
     Public Property WebdavUsername As SecureString
     Public Property WebdavPassword As SecureString
 
-    Public Sub SaveToFile(filePath As string)
-        File.WriteAllText(filePath, JObject.FromObject(Me).ToString)
+    Public Sub SaveToFile(filePath As String)
+        File.WriteAllText(filePath, JsonConvert.SerializeObject(Me))
     End Sub
 
     Public Shared Function LoadFromFile(filePath As String) As UpdateConfig
-        Return JObject.Parse(File.ReadAllText(filePath)).ToObject(Of UpdateConfig)
+        Return JsonConvert.DeserializeObject(Of UpdateConfig)(File.ReadAllText(filePath))
     End Function
 
 End Class