John,
It is possible to paste chords from a word processor. It uses the CTRL+F2 function.
Here's what I did...
1. Opened Notepad and typed a chord. I went for G7aug.
2. Selected the chord and used CTRL+C to copy it.
3. Clicked on the bar in the chord sheet where I wanted to enter the chord.
4. Hit CTRL+F2 (this is the shortcut of right-clicking on the bar and selecting "Edit Chord").
5. Used CTRL+V to paste the chord.
6. Hit enter.
The chord that was copied from Notepad showed up as G7+.
Maybe this will help do what you are after.
Regards,
Noel