Fixed error in regex.

src/NzbDrone.Core/MediaFiles/DiskScanService.cs

@@ -60,7 +60,7 @@ namespace NzbDrone.Core.MediaFiles
             _logger = logger;
         }
 
-        private static readonly Regex ExcludedSubFoldersRegex = new Regex(@"(?:\\|\/|^)(?:extras|@eadir|extrafanart|plex versions|\.\w+)(?:\\|\/|$)", RegexOptions.Compiled | RegexOptions.IgnoreCase);
+        private static readonly Regex ExcludedSubFoldersRegex = new Regex(@"(?:\\|\/|^)(?:extras|@eadir|extrafanart|plex versions|\.[^\\/]+)(?:\\|\/|$)", RegexOptions.Compiled | RegexOptions.IgnoreCase);
         private static readonly Regex ExcludedFilesRegex = new Regex(@"^\._|^Thumbs\.db$", RegexOptions.Compiled | RegexOptions.IgnoreCase);
 
         public void Scan(Series series)