Kudos for the plugin. It does very much what is needed :)
I installed locally and it worked perfectly, but online the admin page appeared like broken. No texts rendered in the form (appeared like <!--? _e('something) ?-->) and the form did not save values.
I am not an expert in php, but i think it has to do with the php.ini conf, to which i do not have access in this case.
Anyway, i got in the ppibfi_admin.php file and replaced all the <? by <?php and all the <?= by <?php echo and now everything appears to be working fine.
Could you please include this in your next version, please? That would be very kind and spare me some time in future updates :D