While MathWorks typically highlights the latest releases, you can still access older versions if you have an active license or university affiliation.
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Many universities provide a "Campus-Wide License." Check your university's IT portal or the MathWorks Campus License page to see if you can download it for free as a student or staff member. MathWorks MATLAB R2019b Free Download
MATLAB provides integrated tools to help you move from data analysis to a finished manuscript. MathWorks MATLAB R2019b Free Download