I just purchased Power Producer 6 Deluxe. I am trying to add a custom background (video) for my DVD menu template, however, I am unable to click the "+" button to add a video or image to Creating Custom Disc Menus


I checked out the help menu, and here is what it says to do:


Using Custom Menu
Background
You can import your own photo or thumbnail
from a video, and use it as your menu's background.
To use a custom background in your disc menu,
do this:
1.
Within the Customize Menu window, click Templates.

2.
Click "+" and then select the photo or video you want to use to import
it into CyberLink PowerProducer.templates.

I followed these instructions, but the "+" button next to the drop down menu is not highlighted, like the feature is not available.

I also attached a screenshot so you can see how the + button is not highlighted.

Thank you for your help!