I am trying to set negative page rules and it only lists 50

I am trying to set negative page rules and it only lists 50 recent pages. I would like it to list more. I read in the manual where I can put define( 'MEMBERSHIP_PAGE_COUNT', 50); in my wp-config.php file to change the settings. I put in define( 'MEMBERSHIP_PAGE_COUNT', 100); yet, I still only see 50 pages. How can I get more pages listed?