https://www.gnupg.org/download/index.en.html
Download at this link. Create new key. Right click on key and select copy. This will copy public key. Paste this to profile. Next, right click and select export keys. This will export both public and priviate. Save this file to USB. You need your key saved (program should know pk, just needs password) on HD to decrypt messages encrypted with YOUR public key. Any questions pm me.