MAL Updater OS X 2.3.8 is now available for users, which fixes a bunch of bugs regarding Plex Media Server detection and other bugs. This version also allows registered/donated users to bypass mandatory updates as they will be considered trusted users.
The 2.3.x branch will be supported for one year and end on November 27, 2018. This branch will support macOS Mavericks and Yosemite. MAL Updater OS X 3.0, which is in development will have bunch of new features, some for registered users. This consists of Automatically downloading new episodes, mass renaming tool, Update to Twitter after scrobble and more. This release will release in Winter 2018. Also, people who registered after July 2017 will receive free licenses (App Store excluded) for the new version. Discount licenses will be available giving a substantial discount. More information will be provided in the future.
To updrade to 2.3.8, simply check for updates.