v.6.2
BUG FIX: No filter pmpro_require_billing so payment fields will show up if the first level passed into the checkout page is free. We still need an update in core PMPro check the pmpro_require_billing filter instead of just the first level when deciding to enqueue gateway JavaScript.
Note: Recent issues after version .5 haven't been correctly pushed to the license server. We are looking into that.