Purchased Appointments+ told me to install Dashboard. Plugin won't install

I have just purchased apointments+ and when I got through the checkout process it had me download the wpmudev dashboard plugin. (I'm assuming in order to install the plugin I purchased: apointments+) However the wpmudev dashboard plugin will not install. I am receiving the following error:

Plugin could not be activated because it triggered a fatal error.
Fatal error: Cannot redeclare class WPMUDEV_Dashboard in /var/www/html/texasnursepractitionerassociates.com/wp-content/plugins/wpmudev-updates/update-notifications.php on line 34

I have tried uploading the plugin zip file through the backend of wordpress
I have also tried unzipping the file and installing it via ftp.

both of these approaches yield the same result.

Do I need to install the dashboard? or can you just point me to where I can directly download the appointments+ plugin?