Most of the time, I want plain text pastes so I use “Paste Plain Text” or “Paste Special–Unformatted Text” in the topic editor and it works. But, when Watching the Clipboard, the Pro version always pastes rich text. How can I ask it to always paste plain text?

There is an option to always paste plain text in watch clipboard operation. It is available on the Tools menu next to the Watch Clipboard operation.