Searched everywhere, need to find this:

On this page of instructions, https://docs.kde.org/stable4/en/kdeutil ... applet-dec

it says

"Decrypting text with KGpg's applet

You can also decrypt the contents of the clipboard with the decrypt clipboard menu entry of the KGpg applet. An editor window will show up with the decrypted text."

I can't find the "decrypt clipboard" menu entry. Not anywhere. Not in the app, not in the clipboard.