diff --git a/ui/flutter/lib/api/model/downloader_config.dart b/ui/flutter/lib/api/model/downloader_config.dart
index 5cab59455..2e3a0efcd 100644
--- a/ui/flutter/lib/api/model/downloader_config.dart
+++ b/ui/flutter/lib/api/model/downloader_config.dart
@@ -17,6 +17,7 @@ class DownloaderConfig {
 
   factory DownloaderConfig.fromJson(Map<String, dynamic> json) =>
       _$DownloaderConfigFromJson(json);
+
   Map<String, dynamic> toJson() => _$DownloaderConfigToJson(this);
 }
 
@@ -29,6 +30,7 @@ class ProtocolConfig {
 
   factory ProtocolConfig.fromJson(Map<String, dynamic>? json) =>
       json == null ? ProtocolConfig() : _$ProtocolConfigFromJson(json);
+
   Map<String, dynamic> toJson() => _$ProtocolConfigToJson(this);
 }
 
@@ -47,6 +49,7 @@ class HttpConfig {
 
   factory HttpConfig.fromJson(Map<String, dynamic> json) =>
       _$HttpConfigFromJson(json);
+
   Map<String, dynamic> toJson() => _$HttpConfigToJson(this);
 }
 
@@ -59,19 +62,27 @@ class BtConfig {
 
   factory BtConfig.fromJson(Map<String, dynamic> json) =>
       _$BtConfigFromJson(json);
+
   Map<String, dynamic> toJson() => _$BtConfigToJson(this);
 }
 
 @JsonSerializable(explicitToJson: true)
 class ExtraConfig {
-  String themeMode = '';
-  String locale = '';
+  String themeMode;
+  String locale;
+  bool lastDeleteTaskKeep;
+
   ExtraConfigBt bt = ExtraConfigBt();
 
-  ExtraConfig();
+  ExtraConfig({
+    this.themeMode = '',
+    this.locale = '',
+    this.lastDeleteTaskKeep = false,
+  });
 
   factory ExtraConfig.fromJson(Map<String, dynamic>? json) =>
       json == null ? ExtraConfig() : _$ExtraConfigFromJson(json);
+
   Map<String, dynamic> toJson() => _$ExtraConfigToJson(this);
 }
 
@@ -112,5 +123,6 @@ class ExtraConfigBt {
 
   factory ExtraConfigBt.fromJson(Map<String, dynamic> json) =>
       _$ExtraConfigBtFromJson(json);
+
   Map<String, dynamic> toJson() => _$ExtraConfigBtToJson(this);
 }
diff --git a/ui/flutter/lib/api/model/downloader_config.g.dart b/ui/flutter/lib/api/model/downloader_config.g.dart
index 662ad4836..b580dfad7 100644
--- a/ui/flutter/lib/api/model/downloader_config.g.dart
+++ b/ui/flutter/lib/api/model/downloader_config.g.dart
@@ -9,7 +9,7 @@ part of 'downloader_config.dart';
 DownloaderConfig _$DownloaderConfigFromJson(Map<String, dynamic> json) =>
     DownloaderConfig(
       downloadDir: json['downloadDir'] as String? ?? '',
-      maxRunning: (json['maxRunning'] as num?)?.toInt() ?? 0,
+      maxRunning: json['maxRunning'] as int? ?? 0,
     )
       ..protocolConfig = ProtocolConfig.fromJson(
           json['protocolConfig'] as Map<String, dynamic>?)
@@ -39,7 +39,7 @@ Map<String, dynamic> _$ProtocolConfigToJson(ProtocolConfig instance) =>
 HttpConfig _$HttpConfigFromJson(Map<String, dynamic> json) => HttpConfig(
       userAgent: json['userAgent'] as String? ??
           'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/116.0.0.0 Safari/537.36',
-      connections: (json['connections'] as num?)?.toInt() ?? 16,
+      connections: json['connections'] as int? ?? 16,
       useServerCtime: json['useServerCtime'] as bool? ?? false,
     );
 
@@ -51,7 +51,7 @@ Map<String, dynamic> _$HttpConfigToJson(HttpConfig instance) =>
     };
 
 BtConfig _$BtConfigFromJson(Map<String, dynamic> json) => BtConfig()
-  ..listenPort = (json['listenPort'] as num).toInt()
+  ..listenPort = json['listenPort'] as int
   ..trackers =
       (json['trackers'] as List<dynamic>).map((e) => e as String).toList();
 
@@ -60,15 +60,17 @@ Map<String, dynamic> _$BtConfigToJson(BtConfig instance) => <String, dynamic>{
       'trackers': instance.trackers,
     };
 
-ExtraConfig _$ExtraConfigFromJson(Map<String, dynamic> json) => ExtraConfig()
-  ..themeMode = json['themeMode'] as String
-  ..locale = json['locale'] as String
-  ..bt = ExtraConfigBt.fromJson(json['bt'] as Map<String, dynamic>);
+ExtraConfig _$ExtraConfigFromJson(Map<String, dynamic> json) => ExtraConfig(
+      themeMode: json['themeMode'] as String? ?? '',
+      locale: json['locale'] as String? ?? '',
+      lastDeleteTaskKeep: json['lastDeleteTaskKeep'] as bool? ?? false,
+    )..bt = ExtraConfigBt.fromJson(json['bt'] as Map<String, dynamic>);
 
 Map<String, dynamic> _$ExtraConfigToJson(ExtraConfig instance) =>
     <String, dynamic>{
       'themeMode': instance.themeMode,
       'locale': instance.locale,
+      'lastDeleteTaskKeep': instance.lastDeleteTaskKeep,
       'bt': instance.bt.toJson(),
     };
 
diff --git a/ui/flutter/lib/api/model/options.g.dart b/ui/flutter/lib/api/model/options.g.dart
index 40a1a8a4e..b496e9fc6 100644
--- a/ui/flutter/lib/api/model/options.g.dart
+++ b/ui/flutter/lib/api/model/options.g.dart
@@ -10,7 +10,7 @@ Options _$OptionsFromJson(Map<String, dynamic> json) => Options(
       name: json['name'] as String,
       path: json['path'] as String,
       selectFiles: (json['selectFiles'] as List<dynamic>?)
-              ?.map((e) => (e as num).toInt())
+              ?.map((e) => e as int)
               .toList() ??
           const [],
       extra: json['extra'],
@@ -35,7 +35,7 @@ Map<String, dynamic> _$OptionsToJson(Options instance) {
 
 OptsExtraHttp _$OptsExtraHttpFromJson(Map<String, dynamic> json) =>
     OptsExtraHttp()
-      ..connections = (json['connections'] as num).toInt()
+      ..connections = json['connections'] as int
       ..autoTorrent = json['autoTorrent'] as bool;
 
 Map<String, dynamic> _$OptsExtraHttpToJson(OptsExtraHttp instance) =>
diff --git a/ui/flutter/lib/api/model/resource.g.dart b/ui/flutter/lib/api/model/resource.g.dart
index 0a5e8fc8a..2feddd86d 100644
--- a/ui/flutter/lib/api/model/resource.g.dart
+++ b/ui/flutter/lib/api/model/resource.g.dart
@@ -8,7 +8,7 @@ part of 'resource.dart';
 
 Resource _$ResourceFromJson(Map<String, dynamic> json) => Resource(
       name: json['name'] as String? ?? "",
-      size: (json['size'] as num?)?.toInt() ?? 0,
+      size: json['size'] as int? ?? 0,
       range: json['range'] as bool? ?? false,
       files: (json['files'] as List<dynamic>)
           .map((e) => FileInfo.fromJson(e as Map<String, dynamic>))
@@ -27,7 +27,7 @@ Map<String, dynamic> _$ResourceToJson(Resource instance) => <String, dynamic>{
 FileInfo _$FileInfoFromJson(Map<String, dynamic> json) => FileInfo(
       path: json['path'] as String? ?? "",
       name: json['name'] as String,
-      size: (json['size'] as num?)?.toInt() ?? 0,
+      size: json['size'] as int? ?? 0,
       req: json['req'] == null
           ? null
           : Request.fromJson(json['req'] as Map<String, dynamic>),
diff --git a/ui/flutter/lib/api/model/result.g.dart b/ui/flutter/lib/api/model/result.g.dart
index 03d4f734e..452a7c7ca 100644
--- a/ui/flutter/lib/api/model/result.g.dart
+++ b/ui/flutter/lib/api/model/result.g.dart
@@ -11,7 +11,7 @@ Result<T> _$ResultFromJson<T>(
   T Function(Object? json) fromJsonT,
 ) =>
     Result<T>(
-      code: (json['code'] as num).toInt(),
+      code: json['code'] as int,
       msg: json['msg'] as String?,
       data: _$nullableGenericFromJson(json['data'], fromJsonT),
     );
diff --git a/ui/flutter/lib/api/model/task.g.dart b/ui/flutter/lib/api/model/task.g.dart
index c0a77b956..b5974a168 100644
--- a/ui/flutter/lib/api/model/task.g.dart
+++ b/ui/flutter/lib/api/model/task.g.dart
@@ -34,9 +34,9 @@ const _$StatusEnumMap = {
 };
 
 Progress _$ProgressFromJson(Map<String, dynamic> json) => Progress(
-      used: (json['used'] as num).toInt(),
-      speed: (json['speed'] as num).toInt(),
-      downloaded: (json['downloaded'] as num).toInt(),
+      used: json['used'] as int,
+      speed: json['speed'] as int,
+      downloaded: json['downloaded'] as int,
     );
 
 Map<String, dynamic> _$ProgressToJson(Progress instance) => <String, dynamic>{
diff --git a/ui/flutter/lib/app/modules/app/controllers/app_controller.dart b/ui/flutter/lib/app/modules/app/controllers/app_controller.dart
index f898b20a2..0135b2467 100644
--- a/ui/flutter/lib/app/modules/app/controllers/app_controller.dart
+++ b/ui/flutter/lib/app/modules/app/controllers/app_controller.dart
@@ -338,7 +338,7 @@ class AppController extends GetxController with WindowListener, TrayListener {
     try {
       downloaderConfig.value = await getConfig();
     } catch (e) {
-      logger.w("load downloader config fail", e);
+      logger.w("load downloader config fail", e, StackTrace.current);
       downloaderConfig.value = DownloaderConfig();
     }
     await _initDownloaderConfig();
diff --git a/ui/flutter/lib/app/modules/create/views/create_view.dart b/ui/flutter/lib/app/modules/create/views/create_view.dart
index bd3e4bdbc..6821852b0 100644
--- a/ui/flutter/lib/app/modules/create/views/create_view.dart
+++ b/ui/flutter/lib/app/modules/create/views/create_view.dart
@@ -17,6 +17,7 @@ import '../../../../util/input_formatter.dart';
 import '../../../../util/message.dart';
 import '../../../../util/util.dart';
 import '../../../routes/app_pages.dart';
+import '../../../views/compact_checkbox.dart';
 import '../../../views/directory_selector.dart';
 import '../../../views/file_list_view.dart';
 import '../../app/controllers/app_controller.dart';
@@ -321,23 +322,13 @@ class CreateView extends GetView<CreateController> {
                             Row(
                               mainAxisSize: MainAxisSize.min,
                               children: [
-                                TextButton(
-                                  onPressed: () {
-                                    controller.directDownload.value =
-                                        !controller.directDownload.value;
-                                  },
-                                  child: Row(children: [
-                                    Obx(() => Checkbox(
-                                          value:
-                                              controller.directDownload.value,
-                                          onChanged: (bool? value) {
-                                            controller.directDownload.value =
-                                                value ?? false;
-                                          },
-                                        )),
-                                    Text('directDownload'.tr),
-                                  ]),
-                                ),
+                                CompactCheckbox(
+                                    label: 'directDownload'.tr,
+                                    value: controller.directDownload.value,
+                                    onChanged: (bool? value) {
+                                      controller.directDownload.value =
+                                          value ?? false;
+                                    }),
                                 TextButton(
                                   onPressed: () {
                                     controller.showAdvanced.value =
@@ -415,7 +406,7 @@ class CreateView extends GetView<CreateController> {
           }
         }
 
-        /* 
+        /*
         Check if is direct download, there has two ways to direct download
         1. Direct download option is checked
         2. Muli line urls
diff --git a/ui/flutter/lib/app/views/buid_task_list_view.dart b/ui/flutter/lib/app/views/buid_task_list_view.dart
index a80b0b3b9..c41987248 100644
--- a/ui/flutter/lib/app/views/buid_task_list_view.dart
+++ b/ui/flutter/lib/app/views/buid_task_list_view.dart
@@ -12,6 +12,7 @@ import '../../util/file_icon.dart';
 import '../../util/icons.dart';
 import '../../util/message.dart';
 import '../../util/util.dart';
+import '../modules/app/controllers/app_controller.dart';
 import '../routes/app_pages.dart';
 
 class BuildTaskListView extends GetView {
@@ -73,7 +74,7 @@ class BuildTaskListView extends GetView {
     }
 
     Future<void> showDeleteDialog(String id) {
-      final keep = true.obs;
+      final appController = Get.find<AppController>();
 
       final context = Get.context!;
 
@@ -83,11 +84,14 @@ class BuildTaskListView extends GetView {
           builder: (_) => AlertDialog(
                 title: Text('deleteTask'.tr),
                 content: Obx(() => CheckboxListTile(
-                    value: keep.value,
+                    value: appController
+                        .downloaderConfig.value.extra.lastDeleteTaskKeep,
                     title: Text('deleteTaskTip'.tr,
                         style: context.textTheme.bodyLarge),
                     onChanged: (v) {
-                      keep.value = v!;
+                      appController.downloaderConfig.update((val) {
+                        val!.extra.lastDeleteTaskKeep = v!;
+                      });
                     })),
                 actions: [
                   TextButton(
@@ -101,7 +105,10 @@ class BuildTaskListView extends GetView {
                     ),
                     onPressed: () async {
                       try {
-                        await deleteTask(id, !keep.value);
+                        final force = !appController
+                            .downloaderConfig.value.extra.lastDeleteTaskKeep;
+                        await appController.saveConfig();
+                        await deleteTask(id, force);
                         Get.back();
                       } catch (e) {
                         showErrorMessage(e);
diff --git a/ui/flutter/lib/app/views/compact_checkbox.dart b/ui/flutter/lib/app/views/compact_checkbox.dart
new file mode 100644
index 000000000..f2840b5cd
--- /dev/null
+++ b/ui/flutter/lib/app/views/compact_checkbox.dart
@@ -0,0 +1,66 @@
+import 'package:flutter/material.dart';
+
+class CompactCheckbox extends StatefulWidget {
+  final String label;
+  final bool value;
+  final ValueChanged<bool?>? onChanged;
+  final double? scale;
+  final TextStyle? textStyle;
+
+  const CompactCheckbox({
+    super.key,
+    required this.label,
+    required this.value,
+    this.onChanged,
+    this.scale,
+    this.textStyle,
+  });
+
+  @override
+  State<CompactCheckbox> createState() => _CompactCheckboxState();
+}
+
+class _CompactCheckboxState extends State<CompactCheckbox> {
+  late bool _value;
+
+  @override
+  void initState() {
+    super.initState();
+    _value = widget.value;
+  }
+
+  valueChanged(bool? value) {
+    setState(() {
+      _value = value!;
+    });
+    widget.onChanged?.call(_value);
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    final checkbox = Checkbox(
+      value: _value,
+      onChanged: valueChanged,
+    );
+
+    return TextButton(
+      onPressed: () {
+        valueChanged(!_value);
+      },
+      child: Row(
+        children: [
+          widget.scale == null
+              ? checkbox
+              : Transform.scale(
+            scale: widget.scale,
+            child: checkbox,
+          ),
+          Text(
+            widget.label,
+            style: widget.textStyle,
+          ),
+        ],
+      ),
+    );
+  }
+}
diff --git a/ui/flutter/lib/core/common/start_config.g.dart b/ui/flutter/lib/core/common/start_config.g.dart
index 85e67b856..8732accb0 100644
--- a/ui/flutter/lib/core/common/start_config.g.dart
+++ b/ui/flutter/lib/core/common/start_config.g.dart
@@ -11,7 +11,7 @@ StartConfig _$StartConfigFromJson(Map<String, dynamic> json) => StartConfig()
   ..address = json['address'] as String
   ..storage = json['storage'] as String
   ..storageDir = json['storageDir'] as String
-  ..refreshInterval = (json['refreshInterval'] as num).toInt()
+  ..refreshInterval = json['refreshInterval'] as int
   ..apiToken = json['apiToken'] as String;
 
 Map<String, dynamic> _$StartConfigToJson(StartConfig instance) =>