Lead Developer
Hi Yancey,
generatepress.1.2.7.zip is the free theme – it can’t be uploaded as a plugin.
To install your add-on, you’ll first have to save the file from your account page to your computer.
Then upload it to the Plugins area.
More info here: http://generatepress.com/knowledgebase/install-activate-addons/
Let me know 🙂