Fixed decrypting of settings

Client/Core/Encryption/AES.cs

@@ -142,6 +142,49 @@ namespace xClient.Core.Encryption
             }
         }
 
+        public static string Decrypt(string input, string keyy)
+        {
+            byte[] key, data;
+            int i;
+
+            try
+            {
+                using (var md5 = new MD5CryptoServiceProvider())
+                {
+                    key = md5.ComputeHash(Encoding.UTF8.GetBytes(keyy));
+                }
+
+                using (var ms = new MemoryStream(Convert.FromBase64String(input)))
+                {
+                    using (var rd = new RijndaelManaged())
+                    {
+                        byte[] iv = new byte[IVLENGTH];
+                        ms.Read(iv, 0, IVLENGTH); // read first 16 bytes for IV, followed by encrypted message
+                        rd.IV = iv;
+                        rd.Key = key;
+
+                        using (var cs = new CryptoStream(ms, rd.CreateDecryptor(), CryptoStreamMode.Read))
+                        {
+                            data = new byte[ms.Length - IVLENGTH + 1];
+                            i = cs.Read(data, 0, data.Length);
+                        }
+
+                        iv = null;
+                    }
+                }
+
+                return Encoding.UTF8.GetString(data, 0, i);
+            }
+            catch
+            {
+                return string.Empty;
+            }
+            finally
+            {
+                data = null;
+            }
+        }
+
         public static byte[] Decrypt(byte[] input)
         {
             if (_key == null) throw new Exception("The key can not be null.");