Mega v5.7.0: http://www.codecguide.com/download_k-lite_codec_pack_mega.htm

Full v5.7.0: http://www.codecguide.com/download_k-lite_codec_pack_full.htm

Update 5.7.5: http://www.codecguide.com/klcp_update.htm

x64 v3.2.0: http://www.codecguide.com/klcp_64bit.htm