diff --git a/TV Player Core/M3UParser.cs b/TV Player Core/M3UParser.cs
index 808a4fa..90602dc 100644
--- a/TV Player Core/M3UParser.cs	
+++ b/TV Player Core/M3UParser.cs	
@@ -221,6 +221,7 @@ namespace TV_Player
         {
             try
             {
+
                 using var client = new HttpClient();
                 using var request = new HttpRequestMessage();
                 client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/text"));
@@ -240,6 +241,11 @@ namespace TV_Player
                 System.Diagnostics.Debug.WriteLine($"Invalid URL: {url} - {ex.Message}");
                 throw;
             }
+            catch (Exception ex)
+            {
+                System.Diagnostics.Debug.WriteLine($"Error reading file from {url}: {ex.Message}");
+                throw;
+            }
         }
 
         public static async Task<(List<M3UInfo> programList, string programGuide)> DownloadM3UFromWebAsync(string url)
diff --git a/TV Player Core/ProgramsData.cs b/TV Player Core/ProgramsData.cs
index b4c598a..bb70979 100644
--- a/TV Player Core/ProgramsData.cs	
+++ b/TV Player Core/ProgramsData.cs	
@@ -1,5 +1,10 @@
-using System.Reactive;
+using System;
+using System.IO;
+using System.Linq;
+using System.Reactive;
 using System.Reactive.Subjects;
+using System.Threading.Tasks;
+using System.Collections.Generic;
 
 namespace TV_Player
 {
@@ -25,7 +30,33 @@ namespace TV_Player
             //string m3uLink = "http://pl.da-tv.vip/a71e77fa/835b3216/tv.m3u";
             try
             {
-                var result = await M3UParser.DownloadM3UFromWebAsync(m3uLink);
+                // if link is a well-formed absolute URI load from web, otherwise treat as a local file path
+                // for relative paths try resolving against the application's base directory
+                var result = (programList: new List<M3UInfo>(), programGuide: string.Empty);
+                if (Uri.IsWellFormedUriString(m3uLink, UriKind.Absolute))
+                {
+                    System.Diagnostics.Debug.WriteLine("[ProgramsData] Detected URL, downloading from web");
+                    result = await M3UParser.DownloadM3UFromWebAsync(m3uLink);
+                }
+                else
+                {
+                    // try as provided path first
+                    var candidate = m3uLink;
+                    if (!Path.IsPathRooted(candidate))
+                    {
+                        candidate = Path.Combine(AppContext.BaseDirectory ?? string.Empty, candidate);
+                    }
+
+                    if (File.Exists(candidate))
+                    {
+                        System.Diagnostics.Debug.WriteLine($"[ProgramsData] Detected local file, loading from disk: {candidate}");
+                        result = await M3UParser.DownloadM3UFromWebAsync(candidate);
+                    }
+                    else
+                    {
+                        throw new FileNotFoundException($"M3U file not found: {m3uLink}");
+                    }
+                }
                 System.Diagnostics.Debug.WriteLine($"[ProgramsData] Downloaded {result.programList.Count} programs");
 
                 programsSubject.OnNext(result.programList);
diff --git a/TV Player WPF/MainWindow.xaml b/TV Player WPF/MainWindow.xaml
index bba0fc8..1145023 100644
--- a/TV Player WPF/MainWindow.xaml	
+++ b/TV Player WPF/MainWindow.xaml	
@@ -4,7 +4,7 @@
         xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
         xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
         xmlns:local="clr-namespace:TV_Player"
-        mc:Ignorable="d" WindowStyle="None" WindowState="{Binding CurrentWindowState}"
+        mc:Ignorable="d" WindowStyle="{Binding CurrentWindowStyle}" WindowState="{Binding CurrentWindowState}"
         Title="TV" Height="450" Width="800"
         KeyDown="UserControl_KeyDown">
     <Window.Resources>
diff --git a/TV Player WPF/ViewModels/MainViewModel.cs b/TV Player WPF/ViewModels/MainViewModel.cs
index 1e2537d..004e226 100644
--- a/TV Player WPF/ViewModels/MainViewModel.cs	
+++ b/TV Player WPF/ViewModels/MainViewModel.cs	
@@ -36,6 +36,14 @@ namespace TV_Player
             get => _currentWindowState;
             set => SetProperty(ref _currentWindowState, value);
         }
+
+        private WindowStyle _currentWindowStyle;
+        public WindowStyle CurrentWindowStyle
+        {
+            get => _currentWindowStyle;
+            set => SetProperty(ref _currentWindowStyle, value);
+        }
+
         public ICommand OnKeyDownCommand { get; }
 
         public ICommand FullscreenCommand { get; }
@@ -53,6 +61,7 @@ namespace TV_Player
             FullscreenCommand = new RelayCommand(OnFullSctreenButtonClick);
             SettingsCommand = new RelayCommand(OnSettingsButtonClick);
             CloseAppCommand = new RelayCommand(OnCloseAppButtonClick);
+            CurrentWindowStyle = WindowStyle.SingleBorderWindow;
         }
 
         public void OnFullSctreenButtonClick()
@@ -60,10 +69,13 @@ namespace TV_Player
             if (CurrentWindowState == WindowState.Normal)
             {
                 CurrentWindowState = WindowState.Maximized;
+                CurrentWindowStyle = WindowStyle.None;
+
             }
             else
             {
                 CurrentWindowState = WindowState.Normal;
+                CurrentWindowStyle = WindowStyle.SingleBorderWindow;
             }
         }
 
diff --git a/TV Player WPF/ViewModels/ProgramsGroupViewModel.cs b/TV Player WPF/ViewModels/ProgramsGroupViewModel.cs
index 59e5e8f..bc29878 100644
--- a/TV Player WPF/ViewModels/ProgramsGroupViewModel.cs	
+++ b/TV Player WPF/ViewModels/ProgramsGroupViewModel.cs	
@@ -21,7 +21,8 @@ namespace TV_Player
         public ProgramsGroupViewModel()
         {
             ItemSelectedCommand = new RelayCommand(OnItemSelected);
-            _groupInformationSubscriber = TVPlayerViewModel.Instance.CurrentProgrmsData.GroupsInformation.Subscribe(x => Programs = SettingsModel.HiddenGroups == null ? x : x.Where(g => !SettingsModel.HiddenGroups.Contains(g.Name.ToLower())).ToList());
+            _groupInformationSubscriber = TVPlayerViewModel.Instance.CurrentProgrmsData.GroupsInformation.Subscribe(x => 
+            Programs = SettingsModel.HiddenGroups == null ? x : x.Where(g => !SettingsModel.HiddenGroups.Contains(g.Name.ToLower())).ToList());
 
             TVPlayerViewModel.Instance.TopPanelVisible(true, "Groups");
 
diff --git a/TV Player WPF/ViewModels/SettingsViewModel.cs b/TV Player WPF/ViewModels/SettingsViewModel.cs
index e3e3aee..cb60787 100644
--- a/TV Player WPF/ViewModels/SettingsViewModel.cs	
+++ b/TV Player WPF/ViewModels/SettingsViewModel.cs	
@@ -67,16 +67,10 @@ namespace TV_Player.ViewModels
             var name = PlaylistName?.Trim();
             if (string.IsNullOrEmpty(name) || string.IsNullOrEmpty(url))
                 return;
-            if (IsValidUrl(url))
-                Playlists.Add(new KeyValuePair<string, string>(name, url));
+            Playlists.Add(new KeyValuePair<string, string>(name, url));
         }
 
-        private bool IsValidUrl(string url)
-        {
-            Uri uriResult;
-            return Uri.TryCreate(url, UriKind.Absolute, out uriResult)
-                   && (uriResult.Scheme == Uri.UriSchemeHttp || uriResult.Scheme == Uri.UriSchemeHttps);
-        }
+
 
         private void OnPlaylistDeleteCommand(KeyValuePair<string, string> pair)
         {
diff --git a/global.json b/global.json
index ed75c1b..8b13789 100644
--- a/global.json
+++ b/global.json
@@ -1,6 +1 @@
-{
-  "sdk": {
-    "version": "8.0.417",
-    "rollForward": "latestPatch"
-  }
-}
+