diff --git a/src/main.cpp b/src/main.cpp
index b21cd05..59790c4 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -190,5 +190,5 @@ static int simple_x264_main(int &argc, char **argv)
 
 int main(int argc, char* argv[])
 {
-	return MUtils::Startup::startup(argc, argv, simple_x264_main, "Simple x264 Launcher", true /*lamexp_version_demo()*/);
+	return MUtils::Startup::startup(argc, argv, simple_x264_main, "Simple x264 Launcher", x264_is_prerelease());
 }
diff --git a/src/version.h b/src/version.h
index 9f8ef2e..f2fc07f 100644
--- a/src/version.h
+++ b/src/version.h
@@ -26,7 +26,7 @@
 #define VER_X264_MAJOR 2
 #define VER_X264_MINOR 4
 #define VER_X264_PATCH 6
-#define VER_X264_BUILD 917
+#define VER_X264_BUILD 918
 
 #define VER_X264_PORTABLE_EDITION (0)
 
diff --git a/z_build.bat b/z_build.bat
index d70f16f..41c6981 100644
--- a/z_build.bat
+++ b/z_build.bat
@@ -100,7 +100,7 @@ copy "%~dp0\bin\Win32\Release\toolset\x64\*.exe"    "%PACK_PATH%\toolset\x64"
 copy "%~dp0\bin\Win32\Release\toolset\x64\*.dll"    "%PACK_PATH%\toolset\x64"
 copy "%~dp0\bin\Win32\Release\toolset\common\*.exe" "%PACK_PATH%\toolset\common"
 copy "%~dp0\bin\Win32\Release\toolset\common\*.gpg" "%PACK_PATH%\toolset\common"
-copy "%~dp0\etc\sources\*.tar"                      "%PACK_PATH%\sources"
+copy "%~dp0\etc\sources\*.xz"                       "%PACK_PATH%\sources"
 copy "%~dp0\LICENSE.html"                           "%PACK_PATH%"
 copy "%~dp0\*.txt"                                  "%PACK_PATH%"