better deserialization

src/BSLManager/Tools/SettingsManager.cs

@@ -89,6 +89,8 @@ namespace BSLManager.Tools
         }
 
         private LocalSettingsData GetLocalSettingsFile()
+        {
+            try
             {
                 if (!File.Exists(LocalFileName)) return null;
 
@@ -96,6 +98,11 @@ namespace BSLManager.Tools
                 var content = JsonConvert.DeserializeObject<LocalSettingsData>(jsonContent);
                 return content;
             }
+            catch (Exception)
+            {
+                return null;
+            }
+        }
 
         private void SaveLocalSettings(LocalSettingsData data)
         {