The plugin seems to be running fine on my local WP running 3.7.1.
If you aren't able to see the "People" meta box in the center column when editing your page it likely means that your page isn't being set to use your "People Page" template for some reason.
Do you have a "people-page.php" template in your theme? Is your page be set to use that template?
Is your theme's PP template ("people-page.php") named appropriately at the top of the file:
/* Template Name: People Page */
I assume this error isn't a repeat of the last issue you had:
If none of those are the problem the next step would probably be to activate debug mode and see what, if any, errors are being thrown.