Clean logbox on start

PotatoNV-next/Controls/LogBox.xaml.cs

@@ -73,6 +73,17 @@ namespace PotatoNV_next.Controls
             }
         }
 
+        public void Clear()
+        {
+            if (!Dispatcher.CheckAccess())
+            {
+                Dispatcher.Invoke(() => Clear());
+                return;
+            }
+
+            logBox.Clear();
+        }
+
         public LogBox()
         {
             InitializeComponent();

PotatoNV-next/MainWindow.xaml

@@ -37,6 +37,6 @@
             </TabItem>
         </TabControl>
 
-        <controls:LogBox />
+        <controls:LogBox x:Name="logBox" />
     </UniformGrid>
 </Window>

PotatoNV-next/MainWindow.xaml.cs

@@ -2,6 +2,7 @@
 using PotatoNV_next.Utils;
 using System;
 using System.Collections.Generic;
+using System.Globalization;
 using System.Linq;
 using System.Text;
 using System.Threading.Tasks;
@@ -19,15 +20,33 @@ namespace PotatoNV_next
 {
     public partial class MainWindow : Window
     {
+        Core core = new Core();
 
         public MainWindow()
         {
             Icon = MediaConverter.ImageSourceFromBitmap(Properties.Resources.Fire.ToBitmap());
             InitializeComponent();
 
-            var core = new Core();
-            nvFrom.OnFormSubmit += core.StartProcess;
+            nvFrom.OnFormSubmit += NvFrom_OnFormSubmit;
             core.RunWorkerCompleted += Core_RunWorkerCompleted;
+
+            SetupLog();
+        }
+
+        private void NvFrom_OnFormSubmit(Controls.NVForm.FormEventArgs formEventArgs)
+        {
+            SetupLog();
+            core.StartProcess(formEventArgs);
+        }
+
+        public void SetupLog()
+        {
+            logBox.Clear();
+            Log.Info($"PotatoNV v{Controls.AboutTab.GetVersion()}");
+            Log.Info("User manual: https://kutt.it/pnv-"
+                + (CultureInfo.InstalledUICulture.TwoLetterISOLanguageName == "ru"
+                    ? "ru"
+                    : "en"));
         }
 
         private void Core_RunWorkerCompleted()