Unfortunately the delete behavior does not have a built-in confirmation option. The extension you are referring to is not compatible with the database updater.
The best way i can think of is:
1. Create two buttons [YES] and [NO] and put them inside a div with any id.. for example - #confirm. Attach the Delete Executor behavior to the YES button. Using CSS apply display:none to the #confirm.
2. Create another div with an id for example - #control and put a button [DELETE] inside it.
3. Place both the hidden #confirm and the visible #control divs inside the same parent container. Sample structure:
<div id="#control">[DELETE BUTTON]</div>
<div id="#confirm">[YES] [NO]</div>
4. Apply a Change Property behavior to the [DELETE] button. On click
- Change the #control display to none
- Change the #confirm display to block
5. Apply a Change Property behavior to the [NO] button. On click
- Change the #confirm display to none
- Change the #control display to block