Check at the top that you have reverted to the free version (and see the new version number). Click “Settings” at the left, then “Account Details” at the top, and then “Deactivate Premium Trial” at the bottom, to revert to the free version.
Click “Install Now” to update the program. You can check the version number and whether it is the free one by looking at the top left. Just a pity that they feel the need to risk confusing and misleading us by automatically installing a trial paid version when all we wanted was the latest free version. They also make it relatively easy to revert back to the free version.
They give us such a good program, in fact, that there is no need to pay for a “premium” version. The Malwarebytes free version of this antivirus software is good enough since it has important features such as web protection, phishing protection, and firewall protection, and real-time protection in its 14 days free trial. Malwarebytes give us a great program free of charge. If you had noted the version number that appears at the top line of the window before embarking on the update, you would see that it has now been incremented to reflect the fact that you have a new version.
But no, they don’t miss the opportunity to install a trial version of the paid program instead. If you use Malwarebytes Free, then following its invitation to “Get the new version free of charge” might lead you to think that it will replace the older free program with a newer free program. Beware when updating Malwarebytes Free – it will start you on a trial of the paid version (again)