make LINQ statement simpler

Credits.cs

@@ -4,6 +4,8 @@ namespace EDJournal {
     public class Credits {
         public static string FormatCredits(int amount) {
             var format = CultureInfo.CurrentCulture.NumberFormat;
+            format.NumberGroupSeparator = ",";
+            format.NumberGroupSizes = new int[1] { 3 };
             if ((amount % 1000000) == 0) {
                 amount /= 1000000;
                 return string.Format("{0}M CR", amount.ToString(format));

PlayerJournal.cs

@@ -38,9 +38,7 @@ namespace EDJournal {
 
         public JournalFile GetLastFile() {
             var lastfile = Files
-                .GroupBy(x => x.Timestamp)
-                .Last()
-                .ToArray<JournalFile>()
+                .OrderBy(x => x.Timestamp)
                 .Last()
                 ;
             return lastfile;