There was a bad zip file on one of the AITpro API Distribution servers, which was replaced at 7:20 pm – 2.5 hours after BPS Pro 13.3 was officially released. If you upgraded BPS Pro between 5pm and 7:20pm PDT and Scheduled MScan scans are not running then do the steps below to force another BPS Pro 13.3 upgrade.
Go to the Plugins > Editor menu|page > in the Select plugin to edit dropdown list at the top right corner > select BulletProof Security Pro > click the Select button > in the Editing window edit: Version: 13.3 and change it to: Version: 13.2 > scroll down > click the Update File button > Go to the Plugins page > click the Plugins nav link 2-3 times and you should see the BPS Pro 13.3 upgrade is available to install.