Thanks for getting in touch. WPMU DEV Smush Pro is the most recent version from the WPMU DEV Premium Plugins directory. Since it appears to be limiting the number of images that can be compressed and keeps asking for an upgrade, it is now a SAAS-plugin that does not add “premium features”, so it is useless for people who do not have a WPMU DEV membership. We will therefore remove it from the repository.
