Cannot activate MATLAB on new computer

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I had MATLAB installed on my computer (R2012a Student version) for some time, but a few weeks ago my entire operating system was destroyed, wiping it out. Now I have a new OS, I tried downloading and installing MATLAB again, but I cannot activate it, because "Error -2,006: No more activations are available for this user". I agree that I only need one computer activated at a time, but how can I deactivate my old MATLAB if the OS is completely gone?

Accepted Answer

Walter Roberson
Walter Roberson on 3 Jun 2016 and click on Activations and Installations. Select your license, and remove the old activation label.
  1 Comment
Nathan Goedeke
Nathan Goedeke on 3 Jun 2016
Worked perfectly. I knew it had to be a simple solution, thanks.

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