Issue #3482 - Fallback to HKLM for preconfigured keys

src/engine/Main.cpp

 /*
  * This file is part of Adblock Plus <https://adblockplus.org/>,
  * Copyright (C) 2006-2016 Eyeo GmbH
  *
  * Adblock Plus is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 3 as
  * published by the Free Software Foundation.
  *
  * Adblock Plus is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ skipping 511 matching lines @@
 
   std::wstring PreconfigurationValueFromRegistry(const std::wstring& preconfigName)
   {
     try
     {
       AdblockPlus::RegistryKey regKey(HKEY_CURRENT_USER, L"Software\\AdblockPlus");
       return regKey.value_wstring(preconfigName);
     }
     catch (const std::runtime_error&)
     {
-      return L"";
+      try
+      {
+        AdblockPlus::RegistryKey regKey(HKEY_LOCAL_MACHINE, L"Software\\AdblockPlus");
+        return regKey.value_wstring(preconfigName);
+      }
+      catch (const std::runtime_error&)
+      {
+        return L"";
+      }
     }
   }
 
 std::auto_ptr<AdblockPlus::FilterEngine> CreateFilterEngine(const std::wstring& locale)
 {
   AdblockPlus::AppInfo appInfo;
   appInfo.version = ToUtf8String(IEPLUGIN_VERSION);
   appInfo.name = "adblockplusie";
 #ifdef _WIN64
   appInfo.application = "msie64";
@@ skipping 213 matching lines @@
   });
 
   int retValue = _AtlModule.WinMain(cmdShow);
   if (communicationThread.joinable())
   {
     communicationThread.join();
   }
 
   return retValue;
 }