[Setup] AppName=EMLy AppVersion=1.1.4 DefaultDirName={autopf}\EMLy OutputBaseFilename=EMLy_Installer ArchitecturesInstallIn64BitMode=x64compatible DisableProgramGroupPage=yes ; Request administrative privileges for HKA to write to HKLM if needed, ; or use "lowest" if purely per-user, but file associations usually work better with admin rights or proper HKA handling. PrivilegesRequired=admin SetupIconFile=..\build\windows\icon.ico UninstallDisplayIcon={app}\EMLy.exe [Files] ; Source path relative to this .iss file (assuming it is in the "installer" folder and build is in "../build") Source: "..\build\bin\EMLy.exe"; DestDir: "{app}"; Flags: ignoreversion Source: "..\build\bin\config.ini"; DestDir: "{app}"; Flags: ignoreversion [Registry] ; 1. Register the .eml extension and point it to our internal ProgID "EMLy.EML" Root: HKA; Subkey: "Software\Classes\.eml"; ValueType: string; ValueName: ""; ValueData: "EMLy.EML"; Flags: uninsdeletevalue ; 2. Define the ProgID with a readable name and icon Root: HKA; Subkey: "Software\Classes\EMLy.EML"; ValueType: string; ValueName: ""; ValueData: "EMLy Email Message"; Flags: uninsdeletekey Root: HKA; Subkey: "Software\Classes\EMLy.EML\DefaultIcon"; ValueType: string; ValueName: ""; ValueData: "{app}\EMLy.exe,0" ; 3. Define the open command ; "%1" passes the file path to the application Root: HKA; Subkey: "Software\Classes\EMLy.EML\shell\open\command"; ValueType: string; ValueName: ""; ValueData: """{app}\EMLy.exe"" ""%1""" ; Optional: Add "Open with EMLy" to context menu explicitly (though file association typically handles the double click) Root: HKA; Subkey: "Software\Classes\EMLy.EML\shell\open"; ValueType: string; ValueName: "FriendlyAppName"; ValueData: "EMLy" [Icons] Name: "{autoprograms}\EMLy"; Filename: "{app}\EMLy.exe"