Trouble Temporarily Disabling WPMU Dashboard

I am trying to transition my site from single-user to multi-user and have already edited the wp-config.php file, but when I try to disable the WPMU DEV Dashboard from the installed plugins portion of WP Admin, it keeps taking me to the dashboard with no disable function. I cannot complete the transition to set up the network without being able to disable the dashboard plugin. Please help ASAP.