<?php
function disable_mp_stripe_statement_descriptor($args, $sub) {
  if(version_compare(MEPR_VERSION, '1.6.0', '<')) {
    $args['statement_descriptor'] = 'mysite.com';
  }
  else {
    $args['product']['statement_descriptor'] = 'mysite.com';
  }

  return $args;
}
add_filter('mepr_stripe_create_plan_args', 'disable_mp_stripe_statement_descriptor', 11, 2);