public void RefreshTranslationFiles(bool showDirNotFoundError = false)
        {
            TranslationFiles.Clear();
            if (Directory.Exists(SelectedFolder))
            {
                DirectoryInfo folder = new DirectoryInfo(SelectedFolder);

                FileInfo[] fileInfos = folder.GetFiles("*.json", SearchOption.TopDirectoryOnly);

                foreach (FileInfo translationFile in fileInfos)
                {
                    StreamReader reader     = new StreamReader(new FileStream(translationFile.FullName, FileMode.Open));
                    string       jsonString = reader.ReadToEnd();
                    Dictionary <string, string>            jsonPairs        = JsonConvert.DeserializeObject <Dictionary <string, string> >(jsonString);
                    ObservableCollection <TranslationPair> translationPairs = new ObservableCollection <TranslationPair>(
                        jsonPairs.Select(pair => new TranslationPair {
                        Key = pair.Key, Value = pair.Value
                    }));
                    string fileName = translationFile.Name.Substring(0, translationFile.Name.Length - translationFile.Extension.Length);

                    TranslationFiles.Add(new TranslationFile {
                        Name = fileName, Path = translationFile.FullName, TranslationPairs = translationPairs
                    });
                }

                RefreshScores();

                _mainWindow.UpdateTabs();
            }
            else
            {
                if (showDirNotFoundError)
                {
                    MessageBox.Show("The selected folder wasn't found.");
                }
            }
        }