This program contains all up-to-date versions of Malwarebytes.
There are certain variants of malware that are designed to stop security programs from being installed and run on infected systems.
Simply put, Chameleon is a tool that disguises Malwarebytes Anti-Malware (MBAM) so it can avoid the active infection designed to stop it allowing MBAM to be installed and run.
Chameleon will also kill any known bad processes that are actively stopping MBAM from installing or running.
If at any time your machine is infected and you try and install MBAM but you are unable to do so, or if you already have the program installed and try to run it but you are unable to do so, then it could be an infection preventing the installation or execution of the program.
This is when Chameleon should be deployed, Chameleon will install its own driver and start to run, it will update MBAM to the latest definitions, (if already installed), kill any known malicious processes that are preventing MBAM from being installed or run, it will then launch MBAM automatically and a scan will begin.