How do I delete a template I don't want?

Beginning with version 6.8, you'll see a new text item at the bottom of the 'Choose a template' window: ( you will only see this option in your MY TEMPLATES directory, which is also the only directory which displays the Template name about the template thumbnail).

Simply click on one of the templates holding down the Option key on your Mac or the ALT key on your Windows machine.

Taaa daaaa!   :D

(you can also delete the templates by simply going into the 'saved templates' folder that you created when you first launched the software and just removing the inner template folder of your choice)