I really hate that Mathworks hides the link to download update release for our regular users. I have several Matlab installations to maintain in my lab, and without the directly download link I have to all these Matlab installations need to download the update by themselves, wasting a lot of time.
An update is a cumulative set of bug fixes applied to an existing installation of MATLAB. Information about limitations and bugs fixed in MATLAB Updates are described in the release notes linked from the download page.
Bug reports also indicate in which Update release a specific bug was fixed and redirect to the download page.
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