It seems that there is a bug in the Malwarebytes update process when both the definitions and engine are updated in sequence. Today I updated to the latest database version which downloaded successfully then Malwarebytes automatically downloaded a new software version (1.62.0.1300 ). After the new version was installed Malwarebytes prompted to update the database - the same version I had just updated. I have had this same scenario happen at least 3 or four times in the past. The lastest database version seems to get lost whenever there is a new engine update following it.