MultiDB showing update available, but am on latest version

Running WP 3.7.1 with the latest WPMU Dev dashboard plugin. I've been using MultiDB for a few years now, and just updated to the latest version (3.1.6). The WPMU Dev Updates page lists Multi-DB as having an update available, but lists the installed version as 3.0.6. I've verified that my db.php and db-config.php files are set to version 3.1.6. Is there any trick to fully updating Multi-DB, or is this just a glitch? Any other places I should check to make sure the version check is accurate?