CB Package Builder - Download Button

A question about the CB Package Builder download button.
How do I dynamically change the text of the download button based on the user's subscription status via CBSub Package Builder?
What I'd like to do is very similar to the Joomlapolis Downloads button where if the user is a visitor then the button says "Subscribe". If the user is subscriber the button text is "Download".
I'd like to do this on both the page that lists all the packages (via the CB Package Builder plugin used as a menu item) and on the individual package displays. See the following links.
www.alphadataiq.com/index.php/adiq-downloads
www.alphadataiq.com/index.php/crispr-cas9-v01-plar-download

Edit your package then under Integrations > CBSubs Package Builder set "Plans" to the plans that will control access to the package. Once done you should see a set of conditional override parameters below it. Those parameters let you override package content when they don't have an active subscription to any of the selected plans. So for example you'd set "Button Title" to "Subscribe" to have the button show "Subscribe" if they're not actively subscribed to the plan. This will apply anywhere the button is rendered.