contrib/sign.bat: revert the ENDLOCAL change after 36538f833f990e43f3a0e7758de1bb74c04056cd
Make "Sharpen Complex 2" shader compatible with Pixel Shader 2.0.

This commit fixes #3008.
MediaFormats: RAR was incorrectly flagged as audio-only.

Fixes #3088
update Changelog.txt, thirdparty/versions.txt and release date.
cosmetics
VSFilter: move the AboutDlg version to a new define and use that
AboutDlg.cpp: use the MPC_VERSION_ARCH define
Reduce variable scope.
remove unneeded variable