Anybody know why I cannot edit the contents of my captions?

Okay, I can delete text captions, smart shapes with text content, or failure captions, but for the first project I have started in Captivate 8 I cannot edit their contents.

I just converted a project from Captivate 7 into C8, and added newly recorded slides to it.  Those captions are editable.  BUT the ones from the freshly started project are not.  When I try to click on the text caption at the top of the timeline, or any other caption in the window, my cursor flips from the pointing finger, to the fist, as long as I hold the mouse button down.  Then it flips back to the pointing finger instead of giving me the I-beam cursor for editing.

This is a software simulation and the captions were added automatically during the recording phase and must be edited.

My project is not responsive.  Here is a snip of the editing window for this project.

Thanks for any help you can offer.

Michele