Handle missing game executable

Author: Strappazzon

src/GHOSTbackup/GHOSTbackup.Localization/Strings.Designer.vb

@@ -547,4 +547,10 @@
   <data name="ui_manage_context_delete_tooltip" xml:space="preserve">
     <value>Elimina il backup selezionato.</value>
   </data>
+  <data name="msgbox_wildlands_installed_missing" xml:space="preserve">
+    <value>{\rtf1 Wildlands sembra essere installato ma {\b l'eseguibile è mancante}. Il download potrebbe essere incompleto oppure è stato eliminato.}</value>
+  </data>
+  <data name="msgbox_wildlands_installed_missing_title" xml:space="preserve">
+    <value>Impossibile avviare Wildlands</value>
+  </data>
 </root>

src/GHOSTbackup/GHOSTbackup.Localization/Strings.it.resx

@@ -566,4 +566,11 @@
   <data name="ui_manage_context_restore_tooltip" xml:space="preserve">
     <value>Restore the selected backup.</value>
   </data>
+  <data name="msgbox_wildlands_installed_missing" xml:space="preserve">
+    <value>{\rtf1 Wildlands appears to be installed but {\b the executable is missing}. Either the download is incomplete or it has been deleted.}</value>
+    <comment>This string MUST be written in Rich Text Format</comment>
+  </data>
+  <data name="msgbox_wildlands_installed_missing_title" xml:space="preserve">
+    <value>Unable to launch Wildlands</value>
+  </data>
 </root>

src/GHOSTbackup/GHOSTbackup.Localization/Strings.resx

@@ -221,7 +221,12 @@ Public Class Form1
     End Sub
 
     Private Sub PlayGameBtn_Click(sender As Object, e As EventArgs) Handles PlayGameBtn.Click
-        Process.Start(GamePath & "GRW.exe")
+        Try
+            Process.Start(GamePath & "GRW.exe")
+        Catch ex As Exception
+            Logger.Log("[ERROR] Unable to launch Wildlands: Executable missing.")
+            CustomMsgBox.Show(Localization.GetString("msgbox_wildlands_installed_missing"), Localization.GetString("msgbox_wildlands_installed_missing_title"), CustomMsgBoxButtons.OKCancel, CustomMsgBoxIcon.Error)
+        End Try
     End Sub
 
     Private Sub SidemenuTasks_Click(sender As Object, e As EventArgs) Handles SidemenuTasks.Click