I wrote this to help passing credit card details securely by email for someone who has little technical knowledge & needs to process a couple of email credit card transactions per day.
You'll need 6.80 & the libraries identified. Create both .exes before playing. Desktop only.
The Admin program creates a public & private key & puts them into the data directory. It can then create a zip with the user program & public key in it. that gets emailed & the resulting file is emailed back for decryption.
Supports using a new key for each email, or reusing the first one generated.
I didn't crack the problem of launching the email program to send it. It also doesn't check for things being moved/deleted beneath it (I'm assuming brain dead interaction on either end on the whole)