diff --git a/flutter/lib/common/widgets/address_book.dart b/flutter/lib/common/widgets/address_book.dart
index 50bb35dca..bb553683c 100644
--- a/flutter/lib/common/widgets/address_book.dart
+++ b/flutter/lib/common/widgets/address_book.dart
@@ -425,7 +425,8 @@ class _AddressBookState extends State<AddressBook> {
       if (canWrite) getEntry(translate("Add ID"), addIdToCurrentAb),
       if (canWrite) getEntry(translate("Add Tag"), abAddTag),
       getEntry(translate("Unselect all tags"), gFFI.abModel.unsetSelectedTags),
-      sortMenuItem(),
+      if (gFFI.abModel.legacyMode.value)
+        sortMenuItem(), // It's already sorted after pulling down
       if (canWrite) syncMenuItem(),
       filterMenuItem(),
       if (!gFFI.abModel.legacyMode.value && canWrite)
diff --git a/flutter/lib/common/widgets/peer_card.dart b/flutter/lib/common/widgets/peer_card.dart
index 1b099cbeb..f9dd73bbf 100644
--- a/flutter/lib/common/widgets/peer_card.dart
+++ b/flutter/lib/common/widgets/peer_card.dart
@@ -636,8 +636,8 @@ abstract class BasePeerCard extends StatelessWidget {
 
   @protected
   Future<bool> _isForceAlwaysRelay(String id) async {
-    return (await bind.mainGetPeerOption(id: id, key: kOptionForceAlwaysRelay))
-        .isNotEmpty;
+    return option2bool(kOptionForceAlwaysRelay,
+        (await bind.mainGetPeerOption(id: id, key: kOptionForceAlwaysRelay)));
   }
 
   @protected
diff --git a/flutter/lib/models/ab_model.dart b/flutter/lib/models/ab_model.dart
index 9fdae087a..8cd5cc922 100644
--- a/flutter/lib/models/ab_model.dart
+++ b/flutter/lib/models/ab_model.dart
@@ -17,17 +17,17 @@ import '../common.dart';
 
 final syncAbOption = 'sync-ab-with-recent-sessions';
 bool shouldSyncAb() {
-  return bind.mainGetLocalOption(key: syncAbOption).isNotEmpty;
+  return bind.mainGetLocalOption(key: syncAbOption) == 'Y';
 }
 
 final sortAbTagsOption = 'sync-ab-tags';
 bool shouldSortTags() {
-  return bind.mainGetLocalOption(key: sortAbTagsOption).isNotEmpty;
+  return bind.mainGetLocalOption(key: sortAbTagsOption) == 'Y';
 }
 
 final filterAbTagOption = 'filter-ab-by-intersection';
 bool filterAbTagByIntersection() {
-  return bind.mainGetLocalOption(key: filterAbTagOption).isNotEmpty;
+  return bind.mainGetLocalOption(key: filterAbTagOption) == 'Y';
 }
 
 const _personalAddressBookName = "My address book";
@@ -815,8 +815,6 @@ abstract class BaseAb {
 }
 
 class LegacyAb extends BaseAb {
-  final sortTags = shouldSortTags().obs;
-  final filterByIntersection = filterAbTagByIntersection().obs;
   bool get emtpy => peers.isEmpty && tags.isEmpty;
   // licensedDevices is obtained from personal ab, shared ab restrict it in server
   var licensedDevices = 0;
@@ -1209,8 +1207,6 @@ class LegacyAb extends BaseAb {
 class Ab extends BaseAb {
   AbProfile profile;
   late final bool personal;
-  final sortTags = shouldSortTags().obs;
-  final filterByIntersection = filterAbTagByIntersection().obs;
   bool get emtpy => peers.isEmpty && tags.isEmpty;
 
   Ab(this.profile, this.personal);
diff --git a/flutter/lib/models/server_model.dart b/flutter/lib/models/server_model.dart
index b643a7c20..613fee6ad 100644
--- a/flutter/lib/models/server_model.dart
+++ b/flutter/lib/models/server_model.dart
@@ -196,7 +196,7 @@ class ServerModel with ChangeNotifier {
       bind.mainSetOption(key: kOptionEnableAudio, value: "N");
     } else {
       final audioOption = await bind.mainGetOption(key: kOptionEnableAudio);
-      _audioOk = audioOption.isEmpty;
+      _audioOk = audioOption != 'N';
     }
 
     // file
@@ -206,7 +206,7 @@ class ServerModel with ChangeNotifier {
     } else {
       final fileOption =
           await bind.mainGetOption(key: kOptionEnableFileTransfer);
-      _fileOk = fileOption.isEmpty;
+      _fileOk = fileOption != 'N';
     }
 
     notifyListeners();
diff --git a/src/rendezvous_mediator.rs b/src/rendezvous_mediator.rs
index dcb538179..65bb6a2b3 100644
--- a/src/rendezvous_mediator.rs
+++ b/src/rendezvous_mediator.rs
@@ -12,7 +12,10 @@ use uuid::Uuid;
 use hbb_common::{
     allow_err,
     anyhow::{self, bail},
-    config::{self, Config, CONNECT_TIMEOUT, READ_TIMEOUT, REG_INTERVAL, RENDEZVOUS_PORT},
+    config::{
+        self, keys::*, option2bool, Config, CONNECT_TIMEOUT, READ_TIMEOUT, REG_INTERVAL,
+        RENDEZVOUS_PORT,
+    },
     futures::future::join_all,
     log,
     protobuf::Message as _,
@@ -637,8 +640,10 @@ async fn direct_server(server: ServerPtr) {
     let mut listener = None;
     let mut port = 0;
     loop {
-        let disabled = Config::get_option("direct-server").is_empty()
-            || !Config::get_option("stop-service").is_empty();
+        let disabled = !option2bool(
+            OPTION_DIRECT_SERVER,
+            &Config::get_option(OPTION_DIRECT_SERVER),
+        ) || option2bool("stop-service", &Config::get_option("stop-service"));
         if !disabled && listener.is_none() {
             port = get_direct_port();
             match hbb_common::tcp::listen_any(port as _).await {
diff --git a/src/ui/index.tis b/src/ui/index.tis
index d76cae583..b10df7623 100644
--- a/src/ui/index.tis
+++ b/src/ui/index.tis
@@ -1149,7 +1149,7 @@ function showSettings() {
 function checkConnectStatus() {
     handler.check_mouse_time(); // trigger connection status updater
     self.timer(1s, function() {
-        var tmp = !!handler.get_option("stop-service");
+        var tmp = handler.get_option("stop-service") == "Y";
         if (tmp != service_stopped) {
             service_stopped = tmp;
             app.update();
diff --git a/src/ui_cm_interface.rs b/src/ui_cm_interface.rs
index 8b4a31f3d..7dae13ebc 100644
--- a/src/ui_cm_interface.rs
+++ b/src/ui_cm_interface.rs
@@ -21,7 +21,7 @@ use clipboard::ContextSend;
 use hbb_common::tokio::sync::mpsc::unbounded_channel;
 use hbb_common::{
     allow_err,
-    config::Config,
+    config::{keys::*, option2bool, Config},
     fs::is_write_need_confirmation,
     fs::{self, get_string, new_send_confirm, DigestCheckResult},
     log,
@@ -583,9 +583,10 @@ pub async fn start_ipc<T: InvokeUiCM>(cm: ConnectionManager<T>) {
             feature = "unix-file-copy-paste"
         ),
     ))]
-    ContextSend::enable(
-        Config::get_option(hbb_common::config::keys::OPTION_ENABLE_FILE_TRANSFER).is_empty(),
-    );
+    ContextSend::enable(option2bool(
+        OPTION_ENABLE_FILE_TRANSFER,
+        &Config::get_option(OPTION_ENABLE_FILE_TRANSFER),
+    ));
 
     match ipc::new_listener("_cm").await {
         Ok(mut incoming) => {
diff --git a/src/ui_interface.rs b/src/ui_interface.rs
index fec0380b5..a192265df 100644
--- a/src/ui_interface.rs
+++ b/src/ui_interface.rs
@@ -3,7 +3,10 @@ use hbb_common::password_security;
 use hbb_common::{
     allow_err,
     bytes::Bytes,
-    config::{self, Config, LocalConfig, PeerConfig, CONNECT_TIMEOUT, RENDEZVOUS_PORT},
+    config::{
+        self, keys::*, option2bool, Config, LocalConfig, PeerConfig, CONNECT_TIMEOUT,
+        RENDEZVOUS_PORT,
+    },
     directories_next,
     futures::future::join_all,
     log,
@@ -1156,9 +1159,9 @@ async fn check_connect_status_(reconnect: bool, rx: mpsc::UnboundedReceiver<ipc:
                                             )
                                         ))]
                                 {
-                                    let b = OPTIONS.lock().unwrap().get(config::keys::OPTION_ENABLE_FILE_TRANSFER).map(|x| x.to_string()).unwrap_or_default();
+                                    let b = OPTIONS.lock().unwrap().get(OPTION_ENABLE_FILE_TRANSFER).map(|x| x.to_string()).unwrap_or_default();
                                     if b != enable_file_transfer {
-                                        clipboard::ContextSend::enable(b.is_empty());
+                                        clipboard::ContextSend::enable(option2bool(OPTION_ENABLE_FILE_TRANSFER, &b));
                                         enable_file_transfer = b;
                                     }
                                 }