It would be great if you could port gpg + a gui for it + enigmail for thunderbird (to be used with portable gpg)...
That way, all I need to do to send encrypted files to not-so-savvy comp users is to provide them with a link to unzip...
thanks 
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You can find Portable Thunderbird + enigmail + gpg executables here: https://portableapps.com/apps/internet/thunderbird_portable
So you dont need GPG+Gui portable.
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