You cannot roll back MATLAB Updates after they have been installed.
In order to revert to a previous update, you will need to uninstall the current MATLAB version, then reinstall with the offline installation files. To retrieve the update-free offline installation files of MATLAB, download the ISO or run the installer to download MATLAB using the 'Download Only' option. See the following Article for more information on downloading installation files for a specific Update level:
Where can I download offline installation files for a specific MATLAB update level?
Please note that for R2018b and later, you can also obtain an ISO with Updates already applied.
For more information on obtaining the offline installation files for MATLAB and the desired MATLAB update, please refer to the following articles:
How can I get MATLAB installation files for use on an offline machine?
How can I download and install a MATLAB Update manually?
