CSS Press free plugin

Hi All - I was just looking through some of the Plugins for Pinegrow free plugins. I downloaded the CSS Press plugin and loaded it into a project. The new elements appear, but no new options for styling show up. Am I doing something wrong, or have recent updates to Pinegrow broken this?
Thanks

Update

I found that the plugin works with at least Foundation and Bootstrap, but not Materialize. Everything goes to heck!! Not sure what the conflict is.

Will look into this @RobM