WHen I purchased the Beaver Builder it came with 2 themes. bb-theme.zip and bb-theme-child.zip. What are the differences, and do I just add both of them as new themes in Wordpress?
Hey Lee,
Welcome to the BB forums! 
They’re actually the same, the child theme is for when you need to make changes to the file themes, i.e., customizing the code of the theme. If you don’t touch code, you should be fine using the parent theme. But I’d recommend just using the child theme, just in case you need to modify the code in the future. To do so, install the parent theme first, then the child theme, and just activate the latter.
You can check the Child Theme codex for more info.
Hope this helps!
Ben