NGFB is multisite aware and provides a network settings page in the Network Admin interface.
Pro version licensing can be managed network-wide, providing a default or forced Authentication ID to individual blogs, or licenses can be entered on each site’s Licenses settings page.
The default site / blog must be licensed to allow Pro version updates from the Network Admin interface. Blog ID 1 is usually the default Network Admin blog, but this can be changed using the
BLOG_ID_CURRENT_SITE constant in
wp-config.php (see the WordPress Settings -> Network Setup page for context).
define( 'BLOG_ID_CURRENT_SITE', 1 );