WP SMUSH PRO used without dashboard


I usually work on a Multisite environment, and have been doing a few sites on a single install. I downloaded WP Smush Pro (i think Pro) by logging into my account, yet I don<t have the pro features. Do I absolutely have to have the dashboard to have these features? I'm only looking to use 1, maybe 2 plugins from WPMUDev on this site.

What would be the procedure to use the Pro version of the plugin without the Dashboard?

Best regards,