If you already have setup a certificate with a private key, you can skip this step.
Start Kleopatra Start Menu: All Programs - Gpg4win - Kleopatra
Go to the menu: File - New Certificate...
Select Create a personal OpenPGP key pair
Fill in the Name and Email
Click Next
Click Create Key
Enter a new passphrase
Click Finish
Enable Plugin in Global Settings
Start SmartFTP
Go to the menu: File - Settings
The settings dialog opens
Go to the Transfer - Queue - Plugins dialog
Select and enable the OpenPGP Decrypt File plugin the list of plugins
Click OK to save the changes
Enable Plugin in Favorite Settings
Go to the Favorite Properties
Go to the Transfer - Queue - Plugins dialog
Select and enable the OpenPGP Decrypt File plugin the list of plugins
Right-click on the plugin, select Properties
Set the Match Filename pattern. If you want to decrypt all the files, use *. If you only want to decrypt the files with the file extension .pgp, use *.pgp
Set the Local User-ID The User-ID can be found in Kleopatra:
Right-click a certificate in the My Certificates tab for which you have a private key and select Certificate Details from the context menu
From the Overview window you can use the Email, Key-ID, Fingerprint or the complete User-ID for the User-ID in the SmartFTP settings.
Set the Passphrase for your certificate/private key
Optional: If you want to automatically remove the .pgp file extension after the file has been decrypted, enter .pgp into the Remove File Extension input box.
Click OK to save the changes
Now all downloaded files which match the file pattern will get decrypted.