You may remove Malwarebytes using the Windows Control Panel if you don't want to run the extra tool to uninstall Malwarebytes completely:
Use Windows-R to open the run box on the system.
Type appwiz.cpl and hit the Enter-key to open the Programs and Features Control Panel applet.
Locate Malwarebytes software in the list of installed programs. The list is sorted alphabetically, but you may change the sort order with a click on a column title (