You need the Full version of Gpg4win unless you are an advanced system administrator or developer who only works inside the Windows Command Prompt.
Gpg4win (GNU Privacy Guard for Windows) brings official OpenPGP encryption to Microsoft Windows. The “Light” (or vanilla) installer and the “Full” installer contain the exact same cryptographic backend, but they offer completely different user experiences. Quick Comparison Gpg4win Light (Vanilla) Gpg4win Full GnuPG Backend Included (Command line) Included (Command line) Graphical Interface (Kleopatra) Included Windows Explorer Extension (GpgEX) Included Outlook Email Plugin (GpgOL) Included Documentation (Compendium) Included Best For Scripts, servers, third-party app integration Everyday users, email, and manual file encryption Gpg4win Light (Vanilla)
The Light version strips away all graphical applications. It installs only the raw GnuPG command-line tool. full, light, or vanilla? | Thunderbird Support Forum
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