WPMU DEV Dashboard not showing up for proper users

I recently updated some plugins on my site, and something has changed to now only my 'admin' user can see the WPMU DEV dashboard. In manage, I can see that it says "To change which users can have access to the WPMU DEV Dashboard, place this line in your wp-config.php file with the desired userids:"

I did this, but it doesn't work. The line I have in is:
define('WPMUDEV_LIMIT_TO_USER','39','1','44');

Every time a user network deactivates/activates the plugin, they are the only user who can use it.