I've made a few additions to that code and made it more readable for the user
Windows Registry Editor Version 5.00
[HKEY_CURRENT_USER\Software\Classes\Directory\Shell\MP3Tag]
"Icon"="\"c:\\\\Program Files (x86)\\\\Mp3tag\\\\Mp3tag.exe\""
[HKEY_CURRENT_USER\Software\Classes\Directory\Shell\MP3Tag\Command]
@="\"C:\\\\Program Files (x86)\\\\Mp3tag\\\\Mp3tag.exe\" \"%1\""
[HKEY_CURRENT_USER\Software\Classes\SystemFileAssociations\.AAC\Shell\MP3Tag]
"Icon"="\"c:\\\\Program Files (x86)\\\\Mp3tag\\\\Mp3tag.exe\""
[HKEY_CURRENT_USER\Software\Classes\SystemFileAssociations\.AAC\Shell\MP3Tag\Command]
@="\"C:\\\\Program Files (x86)\\\\Mp3tag\\\\Mp3tag.exe\" \"%1\""
[HKEY_CURRENT_USER\Software\Classes\SystemFileAssociations\.ALAC\Shell\MP3Tag]
"Icon"="\"c:\\\\Program Files (x86)\\\\Mp3tag\\\\Mp3tag.exe\""
[HKEY_CURRENT_USER\Software\Classes\SystemFileAssociations\.ALAC\Shell\MP3Tag\Command]
@="\"C:\\\\Program Files (x86)\\\\Mp3tag\\\\Mp3tag.exe\" \"%1\""
[HKEY_CURRENT_USER\Software\Classes\SystemFileAssociations\.APE\Shell\MP3Tag]
"Icon"="\"c:\\\\Program Files (x86)\\\\Mp3tag\\\\Mp3tag.exe\""
[HKEY_CURRENT_USER\Software\Classes\SystemFileAssociations\.APE\Shell\MP3Tag\Command]
@="\"C:\\\\Program Files (x86)\\\\Mp3tag\\\\Mp3tag.exe\" \"%1\""
[HKEY_CURRENT_USER\Software\Classes\SystemFileAssociations\.AU\Shell\MP3Tag]
"Icon"="\"c:\\\\Program Files (x86)\\\\Mp3tag\\\\Mp3tag.exe\""
[HKEY_CURRENT_USER\Software\Classes\SystemFileAssociations\.AU\Shell\MP3Tag\Command]
@="\"C:\\\\Program Files (x86)\\\\Mp3tag\\\\Mp3tag.exe\" \"%1\""
[HKEY_CURRENT_USER\Software\Classes\SystemFileAssociations\.CDA\Shell\MP3Tag]
"Icon"="\"c:\\\\Program Files (x86)\\\\Mp3tag\\\\Mp3tag.exe\""
[HKEY_CURRENT_USER\Software\Classes\SystemFileAssociations\.CDA\Shell\MP3Tag\Command]
@="\"C:\\\\Program Files (x86)\\\\Mp3tag\\\\Mp3tag.exe\" \"%1\""
[HKEY_CURRENT_USER\Software\Classes\SystemFileAssociations\.FLAC\Shell\MP3Tag]
"Icon"="\"c:\\\\Program Files (x86)\\\\Mp3tag\\\\Mp3tag.exe\""
[HKEY_CURRENT_USER\Software\Classes\SystemFileAssociations\.FLAC\Shell\MP3Tag\Command]
@="\"C:\\\\Program Files (x86)\\\\Mp3tag\\\\Mp3tag.exe\" \"%1\""
[HKEY_CURRENT_USER\Software\Classes\SystemFileAssociations\.M4A\Shell\MP3Tag]
"Icon"="\"c:\\\\Program Files (x86)\\\\Mp3tag\\\\Mp3tag.exe\""
[HKEY_CURRENT_USER\Software\Classes\SystemFileAssociations\.M4A\Shell\MP3Tag\Command]
@="\"C:\\\\Program Files (x86)\\\\Mp3tag\\\\Mp3tag.exe\" \"%1\""
[HKEY_CURRENT_USER\Software\Classes\SystemFileAssociations\.M4B\Shell\MP3Tag]
"Icon"="\"c:\\\\Program Files (x86)\\\\Mp3tag\\\\Mp3tag.exe\""
[HKEY_CURRENT_USER\Software\Classes\SystemFileAssociations\.M4B\Shell\MP3Tag\Command]
@="\"C:\\\\Program Files (x86)\\\\Mp3tag\\\\Mp3tag.exe\" \"%1\""
[HKEY_CURRENT_USER\Software\Classes\SystemFileAssociations\.MID\Shell\MP3Tag]
"Icon"="\"c:\\\\Program Files (x86)\\\\Mp3tag\\\\Mp3tag.exe\""
[HKEY_CURRENT_USER\Software\Classes\SystemFileAssociations\.MID\Shell\MP3Tag\Command]
@="\"C:\\\\Program Files (x86)\\\\Mp3tag\\\\Mp3tag.exe\" \"%1\""
[HKEY_CURRENT_USER\Software\Classes\SystemFileAssociations\.MOD\Shell\MP3Tag]
"Icon"="\"c:\\\\Program Files (x86)\\\\Mp3tag\\\\Mp3tag.exe\""
[HKEY_CURRENT_USER\Software\Classes\SystemFileAssociations\.MOD\Shell\MP3Tag\Command]
@="\"C:\\\\Program Files (x86)\\\\Mp3tag\\\\Mp3tag.exe\" \"%1\""
[HKEY_CURRENT_USER\Software\Classes\SystemFileAssociations\.MP2\Shell\MP3Tag]
"Icon"="\"c:\\\\Program Files (x86)\\\\Mp3tag\\\\Mp3tag.exe\""
[HKEY_CURRENT_USER\Software\Classes\SystemFileAssociations\.MP2\Shell\MP3Tag\Command]
@="\"C:\\\\Program Files (x86)\\\\Mp3tag\\\\Mp3tag.exe\" \"%1\""
[HKEY_CURRENT_USER\Software\Classes\SystemFileAssociations\.MP3\Shell\MP3Tag]
"Icon"="\"c:\\\\Program Files (x86)\\\\Mp3tag\\\\Mp3tag.exe\""
[HKEY_CURRENT_USER\Software\Classes\SystemFileAssociations\.MP3\Shell\MP3Tag\Command]
@="\"C:\\\\Program Files (x86)\\\\Mp3tag\\\\Mp3tag.exe\" \"%1\""
[HKEY_CURRENT_USER\Software\Classes\SystemFileAssociations\.MP4\Shell\MP3Tag]
"Icon"="\"c:\\\\Program Files (x86)\\\\Mp3tag\\\\Mp3tag.exe\""
[HKEY_CURRENT_USER\Software\Classes\SystemFileAssociations\.MP4\Shell\MP3Tag\Command]
@="\"C:\\\\Program Files (x86)\\\\Mp3tag\\\\Mp3tag.exe\" \"%1\""
[HKEY_CURRENT_USER\Software\Classes\SystemFileAssociations\.MPC\Shell\MP3Tag]
"Icon"="\"c:\\\\Program Files (x86)\\\\Mp3tag\\\\Mp3tag.exe\""
[HKEY_CURRENT_USER\Software\Classes\SystemFileAssociations\.MPC\Shell\MP3Tag\Command]
@="\"C:\\\\Program Files (x86)\\\\Mp3tag\\\\Mp3tag.exe\" \"%1\""
[HKEY_CURRENT_USER\Software\Classes\SystemFileAssociations\.OGG\Shell\MP3Tag]
"Icon"="\"c:\\\\Program Files (x86)\\\\Mp3tag\\\\Mp3tag.exe\""
[HKEY_CURRENT_USER\Software\Classes\SystemFileAssociations\.OGG\Shell\MP3Tag\Command]
@="\"C:\\\\Program Files (x86)\\\\Mp3tag\\\\Mp3tag.exe\" \"%1\""
[HKEY_CURRENT_USER\Software\Classes\SystemFileAssociations\.OFR\Shell\MP3Tag]
"Icon"="\"c:\\\\Program Files (x86)\\\\Mp3tag\\\\Mp3tag.exe\""
[HKEY_CURRENT_USER\Software\Classes\SystemFileAssociations\.OFR\Shell\MP3Tag\Command]
@="\"C:\\\\Program Files (x86)\\\\Mp3tag\\\\Mp3tag.exe\" \"%1\""
[HKEY_CURRENT_USER\Software\Classes\SystemFileAssociations\.OFS\Shell\MP3Tag]
"Icon"="\"c:\\\\Program Files (x86)\\\\Mp3tag\\\\Mp3tag.exe\""
[HKEY_CURRENT_USER\Software\Classes\SystemFileAssociations\.OFS\Shell\MP3Tag\Command]
@="\"C:\\\\Program Files (x86)\\\\Mp3tag\\\\Mp3tag.exe\" \"%1\""
[HKEY_CURRENT_USER\Software\Classes\SystemFileAssociations\.SAP\Shell\MP3Tag]
"Icon"="\"c:\\\\Program Files (x86)\\\\Mp3tag\\\\Mp3tag.exe\""
[HKEY_CURRENT_USER\Software\Classes\SystemFileAssociations\.SAP\Shell\MP3Tag\Command]
@="\"C:\\\\Program Files (x86)\\\\Mp3tag\\\\Mp3tag.exe\" \"%1\""
[HKEY_CURRENT_USER\Software\Classes\SystemFileAssociations\.SPX\Shell\MP3Tag]
"Icon"="\"c:\\\\Program Files (x86)\\\\Mp3tag\\\\Mp3tag.exe\""
[HKEY_CURRENT_USER\Software\Classes\SystemFileAssociations\.SPX\Shell\MP3Tag\Command]
@="\"C:\\\\Program Files (x86)\\\\Mp3tag\\\\Mp3tag.exe\" \"%1\""
[HKEY_CURRENT_USER\Software\Classes\SystemFileAssociations\.TAK\Shell\MP3Tag]
"Icon"="\"c:\\\\Program Files (x86)\\\\Mp3tag\\\\Mp3tag.exe\""
[HKEY_CURRENT_USER\Software\Classes\SystemFileAssociations\.TAK\Shell\MP3Tag\Command]
@="\"C:\\\\Program Files (x86)\\\\Mp3tag\\\\Mp3tag.exe\" \"%1\""
[HKEY_CURRENT_USER\Software\Classes\SystemFileAssociations\.TTA\Shell\MP3Tag]
"Icon"="\"c:\\\\Program Files (x86)\\\\Mp3tag\\\\Mp3tag.exe\""
[HKEY_CURRENT_USER\Software\Classes\SystemFileAssociations\.TTA\Shell\MP3Tag\Command]
@="\"C:\\\\Program Files (x86)\\\\Mp3tag\\\\Mp3tag.exe\" \"%1\""
[HKEY_CURRENT_USER\Software\Classes\SystemFileAssociations\.WAW\Shell\MP3Tag]
"Icon"="\"c:\\\\Program Files (x86)\\\\Mp3tag\\\\Mp3tag.exe\""
[HKEY_CURRENT_USER\Software\Classes\SystemFileAssociations\.WAW\Shell\MP3Tag\Command]
@="\"C:\\\\Program Files (x86)\\\\Mp3tag\\\\Mp3tag.exe\" \"%1\""
[HKEY_CURRENT_USER\Software\Classes\SystemFileAssociations\.WMA\Shell\MP3Tag]
"Icon"="\"c:\\\\Program Files (x86)\\\\Mp3tag\\\\Mp3tag.exe\""
[HKEY_CURRENT_USER\Software\Classes\SystemFileAssociations\.WMA\Shell\MP3Tag\Command]
@="\"C:\\\\Program Files (x86)\\\\Mp3tag\\\\Mp3tag.exe\" \"%1\""
[HKEY_CURRENT_USER\Software\Classes\SystemFileAssociations\.VOC\Shell\MP3Tag]
"Icon"="\"c:\\\\Program Files (x86)\\\\Mp3tag\\\\Mp3tag.exe\""
[HKEY_CURRENT_USER\Software\Classes\SystemFileAssociations\.VOC\Shell\MP3Tag\Command]
@="\"C:\\\\Program Files (x86)\\\\Mp3tag\\\\Mp3tag.exe\" \"%1\""
[HKEY_CURRENT_USER\Software\Classes\SystemFileAssociations\.WV\Shell\MP3Tag]
"Icon"="\"c:\\\\Program Files (x86)\\\\Mp3tag\\\\Mp3tag.exe\""
[HKEY_CURRENT_USER\Software\Classes\SystemFileAssociations\.WV\Shell\MP3Tag\Command]
@="\"C:\\\\Program Files (x86)\\\\Mp3tag\\\\Mp3tag.exe\" \"%1\""