Malwarebytes Anti-Malware unins000.msg is missing, what to do?
The simplest way to do this is to re-install the application using a setup package. Download Malwarebytes setup and then install it over your current installation. The setup will fix all the files and update the uninstallation module to be available again.
Additionally, check the page provided by the developers of the application using the following URL: https://forums.malwarebytes.org/index.php?/topic/146017-mbam-clean-removal-process-2x/
Download Malwarebytes: https://www.malwarebytes.org/mwb-download/index.html
Direct download URL: https://mbam-dl.malwarebytes.org/mbam-setup-220.127.116.117.exe