diff --git a/build-sctg.py b/build-sctg.py
index c8b268ac07..c2aba4e4b0 100755
--- a/build-sctg.py
+++ b/build-sctg.py
@@ -115,11 +115,19 @@ def make_parser():
                         help='Build flutter package', default=False)
     parser.add_argument('--debug', action='store_true',
                         help='Build flutter package with debug flag', default=False)
+    parser.add_argument('--no_customization', action='store_true',
+                        help='Disable application customization', default=False)
     parser.add_argument(
         '--quic',
         action='store_true',
         help='Enable feature Quic'
     )
+    API_SERVER = os.environ['API_SERVER']
+    parser.add_argument(
+        '--disable_api_server_forced',
+        action='store_true',
+        help=f'Disable API server forced to https://{API_SERVER}/'
+    )
     parser.add_argument(
         '--vram',
         action='store_true',
@@ -481,9 +489,10 @@ def insert_line_after(file_path, search_string, new_line):
     with open(file_path, 'w') as file:
         file.writelines(lines)
 
-def sctgdesk_customization():
+def sctgdesk_customization(args):
     MACOS_CODESIGN_IDENTITY = os.environ.get('MACOS_CODESIGN_IDENTITY')
     APP_NAME = os.environ['APP_NAME']
+    APP_NAME_CAPITALIZED = APP_NAME.lower().capitalize()
     RENDEZVOUS_SERVER = os.environ['RENDEZVOUS_SERVER']
     RS_PUB_KEY = os.environ['RS_PUB_KEY']
     API_SERVER = os.environ['API_SERVER']
@@ -494,7 +503,6 @@ def sctgdesk_customization():
     if match:
         TEAM_ID = match.group(1)
     replace_in_file('flutter/ios/Runner.xcodeproj/project.pbxproj',"HZF9JMC8YN",TEAM_ID)
-    replace_in_file('flutter/web/client.html', '__API_SERVER__', f'https://{API_SERVER}')
     replace_in_file('libs/hbb_common/src/config.rs', 'rs-ny.rustdesk.com', RENDEZVOUS_SERVER)
     replace_in_file('libs/hbb_common/src/config.rs', 'OeVuKk5nlHiXp+APNn0Y3pC1Iwpwn44JGqrQCsWqmBw=', RS_PUB_KEY)
     replace_in_file('flutter/web/js/src/connection.ts', 'const PORT = 21116', 'const PORT = 21118')
@@ -535,8 +543,12 @@ def sctgdesk_customization():
     replace_in_all_typed_files('xcconfig', 'com.carriez', f'com.{ORG_NAME}'.lower())
     replace_in_all_typed_files('desktop', 'RustDesk', f'{APP_NAME}')
     replace_in_all_typed_files('service', 'RustDesk', f'{APP_NAME}')
-    insert_line_after('src/common.rs','pub fn get_api_server',f'    return format!("https://{API_SERVER}");')
-    insert_line_after('flutter/web/js/src/globals.js','function getApiServer()',f'  return "https://{API_SERVER}";')
+    replace_in_file('flutter/lib/models/platform_model.dart', 'RustdeskImpl', f'{APP_NAME_CAPITALIZED}Impl')
+    replace_in_file('flutter/lib/models/native_model.dart', 'RustdeskImpl', f'{APP_NAME_CAPITALIZED}Impl')
+    if not args.disable_api_server_forced:
+        replace_in_file('flutter/web/client.html', '__API_SERVER__', f'https://{API_SERVER}')
+        insert_line_after('src/common.rs','pub fn get_api_server',f'    return format!("https://{API_SERVER}");')
+        insert_line_after('flutter/web/js/src/globals.js','function getApiServer()',f'  return "https://{API_SERVER}";')
 
 def build_ios_ipa(version, features):
     MACOS_CODESIGN_IDENTITY = os.environ.get('MACOS_CODESIGN_IDENTITY')
@@ -652,7 +664,8 @@ def main():
     web = args.web
     if not flutter:
         system2('python3 res/inline-sciter.py')
-    sctgdesk_customization()
+    if not args.no_customization:
+        sctgdesk_customization(args)
     print(args.skip_cargo)
     if args.skip_cargo:
         skip_cargo = True
diff --git a/flutter/lib/desktop/pages/desktop_setting_page.dart b/flutter/lib/desktop/pages/desktop_setting_page.dart
index a8b3f290c8..ae92dcfbc4 100644
--- a/flutter/lib/desktop/pages/desktop_setting_page.dart
+++ b/flutter/lib/desktop/pages/desktop_setting_page.dart
@@ -1186,7 +1186,7 @@ class _NetworkState extends State<_Network> with AutomaticKeepAliveClientMixin {
                     apiController, apiErrMsg.value, enabled, secure)),
                 _LabeledTextField(
                     context, 'Key', keyController, '', enabled, secure),
-                _OptionCheckBox(context, 'UDP mode', 'disable-udp-mode',
+                _OptionCheckBox(context, 'UDP mode', 'enable-tcp-mode',
                     enabled: enabled),
                 Row(
                   mainAxisAlignment: MainAxisAlignment.end,
@@ -1609,7 +1609,7 @@ class _AboutState extends State<_About> {
           child: SingleChildScrollView(
             controller: scrollController,
             physics: DraggableNeverScrollableScrollPhysics(),
-            child: _Card(title: '${translate('About')} RustDesk', children: [
+            child: _Card(title: '${translate('About')} SCTGDesk', children: [
               Column(
                 crossAxisAlignment: CrossAxisAlignment.start,
                 children: [
@@ -1627,7 +1627,7 @@ class _AboutState extends State<_About> {
                           .marginSymmetric(vertical: 4.0)),
                   InkWell(
                       onTap: () {
-                        launchUrlString('https://rustdesk.com/privacy.html');
+                        launchUrlString('https://sctg.eu.org/privacy.html');
                       },
                       child: Text(
                         translate('Privacy Statement'),
@@ -1635,7 +1635,7 @@ class _AboutState extends State<_About> {
                       ).marginSymmetric(vertical: 4.0)),
                   InkWell(
                       onTap: () {
-                        launchUrlString('https://rustdesk.com');
+                        launchUrlString('https://sctg.eu.org');
                       },
                       child: Text(
                         translate('Website'),
@@ -1653,7 +1653,7 @@ class _AboutState extends State<_About> {
                             crossAxisAlignment: CrossAxisAlignment.start,
                             children: [
                               Text(
-                                'Copyright © ${DateTime.now().toString().substring(0, 4)} Purslane Ltd.\n$license',
+                                'Copyright © ${DateTime.now().toString().substring(0, 4)} Sctg and Purslane Ltd.\n$license',
                                 style: const TextStyle(color: Colors.white),
                               ),
                               Text(
diff --git a/src/rendezvous_mediator.rs b/src/rendezvous_mediator.rs
index 30e71f2259..0064a2e036 100644
--- a/src/rendezvous_mediator.rs
+++ b/src/rendezvous_mediator.rs
@@ -387,8 +387,8 @@ impl RendezvousMediator {
     }
 
     pub fn is_udp_disabled() -> bool {
-        let option_tcp = Config::get_option("disable-udp-mode");
-        log::debug!("disable-udp-mode: {}", option_tcp);
+        let option_tcp = Config::get_option("enable-tcp-mode");
+        log::debug!("enable-tcp-mode: {}", option_tcp);
         if option_tcp == "N"{
             return true;
         }else{