@echo off
SET AppKey=SublimeText3
SET AppTitle=Open with Sublime Text 3
SET AppPath=C:\Program Files\Sublime Text 3\sublime_text.exe
SET AppIcon=%AppPath%,0

rem add it for all file types
REG ADD "HKEY_CLASSES_ROOT\*\shell\%AppKey%" /ve /f /d "%AppTitle%"
REG ADD "HKEY_CLASSES_ROOT\*\shell\%AppKey%" /v "Icon" /f /d "%AppIcon%"
REG ADD "HKEY_CLASSES_ROOT\*\shell\%AppKey%\command" /ve /f /d "%AppPath% \"%%1\""

rem add it for folders
REG ADD "HKEY_CLASSES_ROOT\Directory\shell\%AppKey%" /ve /f /d "%AppTitle%"
REG ADD "HKEY_CLASSES_ROOT\Directory\shell\%AppKey%" /v "Icon" /f /d "%AppIcon%"
REG ADD "HKEY_CLASSES_ROOT\Directory\shell\%AppKey%\command" /ve /f /d "%AppPath% \"%%v\""

rem add it for current folder
REG ADD "HKEY_CLASSES_ROOT\Directory\Background\shell\%AppKey%" /ve /f /d "%AppTitle%"
REG ADD "HKEY_CLASSES_ROOT\Directory\Background\shell\%AppKey%" /v "Icon" /f /d "%AppIcon%"
REG ADD "HKEY_CLASSES_ROOT\Directory\Background\shell\%AppKey%\command" /ve /f /d "%AppPath% \"%%v\""