Adding lyrics at the End

[S. Parks]

Yesterday, I was working on a 3 doors Down song(Vogone does a sweet job on their songs by the way), I'd imported and vocal reduced, and at the end of the song, the was a few "yeah, yeah" 's that weren't in the lyrics I added over the internet. When I try to add the lyrics at the end, KPro won't let me do it. In order to get the lyrics to change, I had to go back to notepad, edit the lyrics, then add to KPro. Was this becasue I had already placed lyrics? I know it's a given that you have to replace the lyrics if you add or edit, but it wouldn't let me do it. Any comments from anyone? Is there a way around this wothout going back to notepad?