I'm using a child theme and the plugin is not recognizing the existence of my custom obits.css file. It is in the correct location, and is accessible via URL at: http://my.domain.com/wp-content/themes/mytheme/obits.css
... so I know it's in the right place... however the plugin still loads the css from the plugin's css directory, ignoring my custom obits.css file.
I've worked around the problem by adding the overrides to my theme's style.css file.
Also, you might want to remove the Dreamweaver "_notes" directories from the plugin download. These folders contain Dreamweaver sync information from David's work on dlg360.com