As a partner of MalwareBytes, we have the opportunity to offer our clients a special price on MalwareBytes Premium. This license can be installed on up to 3 computers for just $25. If you were to purchase this from MalwareBytes directly, the license is $25 per machine.
The advantages over the free version are definitely worth the $25. With the free version, you must run MalwareBytes manually, update manually, scan manually and the software only detects and removes infections after they have infected your machine.
The premium version runs all the time and catches infections as they try to enter your machine. It updates itself, scans automatically and automatically removes infections. Very little interaction with the user is required.